809925 has 12 divisors (see below), whose sum is σ = 1339200. Its totient is φ = 431920.

The previous prime is 809917. The next prime is 809929. The reversal of 809925 is 529908.

It is not a de Polignac number, because 809925 - 2³ = 809917 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 809925.

It is not an unprimeable number, because it can be changed into a prime (809929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5325 + ... + 5474.

It is an arithmetic number, because the mean of its divisors is an integer number (111600).

2⁸⁰⁹⁹²⁵ is an apocalyptic number.

It is an amenable number.

809925 is a deficient number, since it is larger than the sum of its proper divisors (529275).

809925 is a wasteful number, since it uses less digits than its factorization.

809925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10812 (or 10807 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 809925 is about 899.9583323688. The cubic root of 809925 is about 93.2140980227.

The spelling of 809925 in words is "eight hundred nine thousand, nine hundred twenty-five".