812925 has 18 divisors (see below), whose sum is σ = 1456442. Its totient is φ = 433440.

The previous prime is 812921. The next prime is 812939. The reversal of 812925 is 529218.

It can be written as a sum of positive squares in 3 ways, for example, as 13689 + 799236 = 117^2 + 894^2 .

It is not a de Polignac number, because 812925 - 2² = 812921 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

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 812925.

It is not an unprimeable number, because it can be changed into a prime (812921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1582 + ... + 2031.

2⁸¹²⁹²⁵ is an apocalyptic number.

It is an amenable number.

812925 is a deficient number, since it is larger than the sum of its proper divisors (643517).

812925 is a wasteful number, since it uses less digits than its factorization.

812925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3629 (or 3621 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 812925 is about 901.6235356289. The cubic root of 812925 is about 93.3290460049.

The spelling of 812925 in words is "eight hundred twelve thousand, nine hundred twenty-five".