The number 1289 (twelve hundred eighty-nine) 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 n ...
following 1288 and preceding 1290.
[
"Number Gossip: 1289",
March 2008, webpage:
]
Numbergossip-1289
In mathematics
The number 1289 is an odd
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 ...
, following 1283 and preceding 1291.
[ It is classified as an apocalyptic power, a deficient number, and an ]evil number
In number theory, an evil number is a non-negative integer that has an even Hamming weight, number of 1s in its Binary number, binary expansion. These numbers give the positions of the zero values in the Thue–Morse sequence, and for this reason ...
:[
* The number 1289 is called an apocalyptic power because 21289 contains the consecutive digits 666 (in decimal), as the ]Number of the beast
The number of the beast ( grc-koi, Ἀριθμὸς τοῦ θηρίου, ) is associated with the Beast of Revelation in chapter 13, verse 18 of the Book of Revelation. In most manuscripts of the New Testament and in English translations of ...
: in the sequence ..., 1281, 1285, 1286, 1289, 1290, 1298, 1301, etc.[
"Apocalyptic Number -- from Wolfram MathWorld",
Mathworld.Wolfram.com, August 2010, webpage:
]
MW-Apoc
* The number 1289 is a deficient number because the sum of all its positive divisors (except itself) totals less than 1289.[ Compare with perfect and abundant numbers.
* The number 1289 is an ]evil number
In number theory, an evil number is a non-negative integer that has an even Hamming weight, number of 1s in its Binary number, binary expansion. These numbers give the positions of the zero values in the Thue–Morse sequence, and for this reason ...
because it has an even number of 1's contained in its binary expansion.[
]
In technology
* 1289 is a 4.5 volt battery
Battery most often refers to:
* Electric battery, a device that provides electrical power
* Battery (crime), a crime involving unlawful physical contact
Battery may also refer to:
Energy source
*Automotive battery, a device to provide power t ...
with 3 "B Size" cells in flat side-by-side format with brass-strip connections, also known as MN1203, 3LR12 and many other IEC "R12" variations. Used in Rear cycle lamps, hand torches and in pairs in many Continental European Radio models.
Historical years
* 1289 AD, 1289 BC.
Notes
Integers