811265 has 16 divisors (see below), whose sum is σ = 1198848. Its totient is φ = 513216.

The previous prime is 811259. The next prime is 811273. The reversal of 811265 is 562118.

It is a cyclic number.

It is not a de Polignac number, because 811265 - 2¹⁴ = 794881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 811265.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (74928).

2⁸¹¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

811265 is a deficient number, since it is larger than the sum of its proper divisors (387583).

811265 is a wasteful number, since it uses less digits than its factorization.

811265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808.

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

The square root of 811265 is about 900.7025036048. The cubic root of 811265 is about 93.2654764711.

The spelling of 811265 in words is "eight hundred eleven thousand, two hundred sixty-five".