41 (forty-one, XLI) is the

natural number In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''cardinal ...

following 40 and preceding 42.

In mathematics

* the 13th smallest

prime number A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways ...

. The next is 43, making both

twin prime A twin prime is a prime number that is either 2 less or 2 more than another prime number—for example, either member of the twin prime pair (41, 43). In other words, a twin prime is a prime that has a prime gap of two. Sometimes the term ''twin p ...

s. * the sum of the first six prime numbers (2 + 3 + 5 + 7 + 11 + 13). * the 12th supersingular prime * a

Newman–Shanks–Williams prime In mathematics, a Newman–Shanks–Williams prime (NSW prime) is a prime number ''p'' which can be written in the form :S_=\frac. NSW primes were first described by Morris Newman, Daniel Shanks and Hugh C. Williams in 1981 during the study of ...

. * the smallest

Sophie Germain prime In number theory, a prime number ''p'' is a if 2''p'' + 1 is also prime. The number 2''p'' + 1 associated with a Sophie Germain prime is called a . For example, 11 is a Sophie Germain prime and 2 × 11 + ...

to start a

Cunningham chain In mathematics, a Cunningham chain is a certain sequence of prime numbers. Cunningham chains are named after mathematician A. J. C. Cunningham. They are also called chains of nearly doubled primes. Definition A Cunningham chain of the first ...

of the first kind of three terms, . * an

Eisenstein prime In mathematics, an Eisenstein prime is an Eisenstein integer : z = a + b\,\omega, \quad \text \quad \omega = e^, that is irreducible (or equivalently prime) in the ring-theoretic sense: its only Eisenstein divisors are the units , itself ...

, with no imaginary part and real part of the form 3''n'' − 1. * a

Proth prime A Proth number is a natural number ''N'' of the form N = k \times 2^n +1 where ''k'' and ''n'' are positive integers, ''k'' is odd and 2^n > k. A Proth prime is a Proth number that is prime. They are named after the French mathematician François ...

as it is 5 × 2³ + 1. * the largest lucky number of Euler: the polynomial yields primes for all the integers ''k'' with . * the sum of two squares, 4² + 5². * the sum of the sum of the divisors of the first 7

positive integers In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''cardinal ...

. * the smallest integer whose reciprocal has a 5-digit

repetend A repeating decimal or recurring decimal is decimal representation of a number whose digits are periodic (repeating its values at regular intervals) and the infinitely repeated portion is not zero. It can be shown that a number is rational if an ...

. That is a consequence of the fact that 41 is a factor of 99999. * the smallest integer whose

square root In mathematics, a square root of a number is a number such that ; in other words, a number whose ''square'' (the result of multiplying the number by itself, or  ⋅ ) is . For example, 4 and −4 are square roots of 16, because . ...

has a

continued fraction In mathematics, a continued fraction is an expression obtained through an iterative process of representing a number as the sum of its integer part and the reciprocal of another number, then writing this other number as the sum of its integer ...

with

period Period may refer to: Common uses * Era, a length or span of time * Full stop (or period), a punctuation mark Arts, entertainment, and media * Period (music), a concept in musical composition * Periodic sentence (or rhetorical period), a concept ...

3. * a

centered square number In elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center and all other dots surrounding the center dot in successive square layers. That is, each cen ...

. * a prime index prime, as 13 is prime.

In science

* The

atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...

of niobium.

In astronomy

Messier object The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ''Catalogue des Nébuleuses et des Amas d'Étoiles'' (''Catalogue of Nebulae and Star Clusters''). Because Messier was only in ...

M41, a

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

5.0

open cluster An open cluster is a type of star cluster made of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, an ...

in the constellation Canis Major. * The New General Catalogue object

NGC 41 NGC 41 is a spiral galaxy located in the constellation Pegasus. It is located about 290 million light-years (90 Megaparsecs) away from the Sun. It was discovered on October 30, 1864, by the astronomer Albert Marth Albert Marth (5 May 1828 � ...

, a spiral galaxy in the constellation Pegasus.

In music

* " #41", a song by

Dave Matthews Band Dave Matthews Band (also known by the initials DMB) is an American rock band formed in Charlottesville, Virginia, in 1991. The band's founding members were singer-songwriter and guitarist Dave Matthews, bassist Stefan Lessard, drummer and bac ...

. * "

American Skin (41 Shots) "American Skin (41 Shots)" is a song written by Bruce Springsteen, inspired by the police shooting death of Amadou Diallo. It premiered during the band's 1999–2000 reunion tour in concert in Atlanta on June 4, 2000, the final concert before ...

" is a song by Bruce Springsteen about an immigrant murder victim who was shot at 41 times by the

NYPD The New York City Police Department (NYPD), officially the City of New York Police Department, established on May 23, 1845, is the primary municipal law enforcement agency within the City of New York, the largest and one of the oldest in ...

In film

* The name of an independent documentary about Nicholas O'Neill, the youngest victim of the Station nightclub fire. * 2012 documentary on the life of the 41st President of the United States George H. W. Bush.

In other fields

* The international direct dialing (IDD) code for Switzerland. * Bush 41, George H. W. Bush, the 41st

President of the United States The president of the United States (POTUS) is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States ...

. * In Mexico "cuarenta y uno" (41) is slang referring to a homosexual. This is due to the 1901 arrest of 41 homosexuals at a hotel in

Mexico City Mexico City ( es, link=no, Ciudad de México, ; abbr.: CDMX; Nahuatl: ''Altepetl Mexico'') is the capital city, capital and primate city, largest city of Mexico, and the List of North American cities by population, most populous city in North Amer ...

during the government of Porfirio Díaz (1876–1911). See:

Dance of the Forty-One The Dance of the Forty-One or the Ball of the Forty-One (Spanish: ) was a society scandal in early 20th-century Mexico, during the presidency of Porfirio Díaz. The incident revolved around an illegal police raid carried out on 17 November 1901 ...

* Number of ballistic missile submarines of the ''George Washington'' class and its successors, collectively known as the "

41 for Freedom 41 for Freedom refers to the US Navy Fleet Ballistic Missile (FBM) submarines from the , , , , and es. All of these submarines were commissioned 1959–1967, as the goal was to create a credible, survivable sea-based deterrent as quickly as poss ...

". * The 41st season of CBS's reality program '' Survivor'' is simply subtitled '' Survivor 41''. *A slang term for a

transsexual Transsexual people experience a gender identity that is inconsistent with their assigned sex, and desire to permanently transition to the sex or gender with which they identify, usually seeking medical assistance (including sex reassignmen ...

person, or for suicide, due to a study purportedly claiming that 41% of transsexuals have attempted to commit suicide.

References

{{DEFAULTSORT:41 (Number) Integers