Number 825 is not a prime number. It is a composite number.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. We do not consider 825 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 825 below).

Number of factors: 12.

List of factors/divisors: 1, 3, 5, 11, 15, 25, 33, 55, 75, 165, 275, 825.

Parity: 825 is an odd number.

Perfect square: no (a square number or perfect square is an integer that is the square of an integer).

Perfect number: no, because the sum of its proper divisors is 663 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 818 no | 819 no | 820 no | 821 yes | 822 no | 823 yes | 824 no | 825 no | 826 no | 827 yes | 828 no | 829 yes | 830 no | 831 no | 832 no |
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