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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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