What is 1 (number)?
{{Infobox number | number = 1 | numeral = [[Unary numeral system|unary]] | cardinal = one, unit, unity | factorization = 1 | divisor = 1 | roman unicode = Ⅰ, ⅰ | greek prefix = [[Wiktionary:mono-|mono-]] /[[Wiktionary:haplo-|haplo-]] | latin prefix = [[Wiktionary:uni-|uni-]] | lang1 = [[Greek numeral]] | lang1 symbol = α' | lang2 = [[Persian language|Persian]] | lang2 symbol = {{resize|150%|١ - یک}} | lang3 = [[Eastern Arabic numerals|Arabic]] | lang3 symbol = {{resize|150%|١}} | lang4 = [[Urdu]] | lang4 symbol = {{Urdu|1|11|top}} | lang5 = [[Ge'ez alphabet|Ge'ez]] | lang5 symbol = ፩ | lang6 = [[Bengali language|Bengali]] & [[Assamese language|Assamese]] | lang6 symbol = {{resize|150%|১}} | lang7 = [[Chinese numeral]] | lang7 symbol = 一，弌，壹 | lang8 = [[Korean language|Korean]] | lang8 symbol = 일, 하나 | lang9 = [[Devanāgarī]] | lang9 symbol = {{resize|150%|१}} | lang10 = [[Telugu language|Telugu]] | lang10 symbol = {{resize|150%|೧}} | lang11 = [[Tamil language|Tamil]] | lang11 symbol = {{resize|150%|௧}} | lang12 = [[Kannada language|Kannada]] | lang12 symbol = {{resize|150%|೧}} | lang13 = [[Hebrew numerals|Hebrew]] | lang13 symbol = {{resize|150%|א}} ([[aleph|alef]]) | lang14 = [[Khmer numerals|Khmer]] | lang14 symbol = ១ | lang15 = [[Thai numerals|Thai]] | lang15 symbol = ๑ | lang16 = [[Malayalam]] | lang16 symbol = ൧ | lang17 = [[Counting rods|Counting rod]] | lang17 symbol = 𝍠 }} [[File:Chinesische.Zahl.Eins.jpg|thumb|[[China|Chinese]] hand sign]] [[File:En-us-One.ogg|thumb|right|Pronunciation of the number 1.]] {{dablink|This article is about the number one. For the year, see [[1]].}} {{dablink|Not to be confused with [[I]].}} '''One''' ('''1''') is the first natural number, followed by [[2 (number)|two]]. The [[Roman numeral]] for one is '''I'''. == Mathematics == In [[mathematics]], the number one is the [[Identity Property|multiplicative identity]].<ref>{{Cite web|last=Weisstein|first=Eric W.|title=1|url=https://mathworld.wolfram.com/1.html|access-date=2020-09-22|website=mathworld.wolfram.co