View source for 1 (number)

'''1''' is the [[Hindu-Arabic]] [[numeral]] for the [[number]] '''one''' (the [[unit]]).

1 is the smallest positive [[integer]], and smallest [[natural number]].

1 is the only positive integer that is neither prime nor composite.

1 is a divisor of any integer.

:<math> 1|n, \forall n \in \N </math> 

1 is the multiplicative identity, that is, any number multiplied by 1 equals itself.

:<math> a\cdot 1 = a </math>
Not only that, but if you do <math>1 [x>1] 1</math>, it will always equal 1. 

1 is the only odd [[Practical numbers|practical number]].

1 can't be used as the base nor the argument of logarithms.

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{{Integers}}
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[[Category:Stubs]]
[[Category:Numbers]]
[[Category:Numerals]]
[[Category:Integers]]
[[Category:Natural Number]]
[[Category:Whole Number]]
[[Category:Real numbers]]
[[Category:Complex numbers]]
[[Category:Rational Number]]
[[Category:One Digit Number]]