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== As a number == | == As a number == | ||
One, sometimes referred to as '''unity''',<ref>Skoog, Douglas. ''Principles of Instrumental Analysis''. Brooks/Cole, 2007, p. 758.</ref | One, sometimes referred to as '''unity''',<ref name=":0" /><ref>Skoog, Douglas. ''Principles of Instrumental Analysis''. Brooks/Cole, 2007, p. 758.</ref> is the first non-zero [[natural number]]. It is thus the [[integer]] after [[zero]]. | ||
Any number multiplied by one remains that number, as one is the [[Identity element|identity]] for [[multiplication]]. As a result, 1 is its own [[factorial]], its own [[Square (algebra)|square]] and [[square root]], its own [[Cube (algebra)|cube]] and [[cube root]], and so on. One is also the result of the [[empty product]], as any number multiplied by one is itself. It is also the only natural number that is neither [[composite number|composite]] nor [[prime number|prime]] with respect to [[Division (mathematics)|division]], but is instead considered a [[unit (ring theory)|unit]] (meaning of [[ring theory]]). | Any number multiplied by one remains that number, as one is the [[Identity element|identity]] for [[multiplication]]. As a result, 1 is its own [[factorial]], its own [[Square (algebra)|square]] and [[square root]], its own [[Cube (algebra)|cube]] and [[cube root]], and so on. One is also the result of the [[empty product]], as any number multiplied by one is itself. It is also the only natural number that is neither [[composite number|composite]] nor [[prime number|prime]] with respect to [[Division (mathematics)|division]], but is instead considered a [[unit (ring theory)|unit]] (meaning of [[ring theory]]). | ||
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{{DEFAULTSORT:1 (Number)}} | {{DEFAULTSORT:1 (Number)}} | ||
{{#seo: | |||
|keywords=Integers | |||
|description=1 is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For ... | |||
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[[Category:1 (number)| ]] | [[Category:1 (number)| ]] | ||
[[Category:Integers]] | [[Category:Integers]] | ||