811625 has 16 divisors (see below), whose sum is σ = 1043328. Its totient is φ = 630000.

The previous prime is 811619. The next prime is 811627. The reversal of 811625 is 526118.

It is not a de Polignac number, because 811625 - 2⁶ = 811561 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 811625.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 811625.

It is not an unprimeable number, because it can be changed into a prime (811627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5300 + ... + 5450.

It is an arithmetic number, because the mean of its divisors is an integer number (65208).

2⁸¹¹⁶²⁵ is an apocalyptic number.

It is an amenable number.

811625 is a deficient number, since it is larger than the sum of its proper divisors (231703).

811625 is a wasteful number, since it uses less digits than its factorization.

811625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 199 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 811625 is about 900.9023254493. The cubic root of 811625 is about 93.2792699937.

The spelling of 811625 in words is "eight hundred eleven thousand, six hundred twenty-five".