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.
1 is the multiplicative identity, that is, any number multiplied by 1 equals itself.
Not only that, but if you do , it will always equal 1.
1 is the only odd practical number.
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