1

Natural number Natural number ← 0 1 2 → −1 0 1 2 3 4 5 6 7 8 9 → List of numbersIntegers← 0 10 20 30 40 50 60 70 80 90 →CardinaloneOrdinal1st(first)Numeral systemunaryFactorization∅Divisors1Greek numeralΑ´Roman numeralI, iGreek prefixmono-/haplo-Latin prefixuni-Binary12Ternary13Senary16Octal18Duodecimal112Hexadecimal116Greek numeralα'Arabic, Kurdish, Persian, Sindhi, Urdu١Assamese & Bengali১Chinese numeral一/弌/壹Devanāgarī१Santali᱑Ge'ez፩GeorgianႠ/ⴀ/ა(Ani)HebrewאJapanese numeral一/壱Kannada೧Khmer១ArmenianԱMalayalam൧Meitei꯱Thai๑Tamil௧Telugu೧Babylonian numeral𒐕Egyptian hieroglyph, Aegean numeral, Chinese counting rod𓏤Mayan numeral•Morse code. _ _ _ _Cyrillic numeralsА 1 (one, unit, unity) is a number, numeral, and grapheme. It is the first and smallest positive integer of the infinite sequence of natural numbers. This fundamental property has led to its unique uses in other fields, ranging from science to sports, where it commonly denotes the first, leading, or top thing in a group. 1 is the unit of counting or measurement, and represents a single thing. The representation of 1 evolved from ancient Sumerian and Babylonia