811065 has 16 divisors (see below), whose sum is σ = 1310400. Its totient is φ = 428352.

The previous prime is 811039. The next prime is 811067. The reversal of 811065 is 560118.

It is not a de Polignac number, because 811065 - 2⁸ = 810809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (811067) 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, 1891 + ... + 2279.

It is an arithmetic number, because the mean of its divisors is an integer number (81900).

2⁸¹¹⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

811065 is a deficient number, since it is larger than the sum of its proper divisors (499335).

811065 is a wasteful number, since it uses less digits than its factorization.

811065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 811065 is about 900.5914723114. The cubic root of 811065 is about 93.2578116397.

The spelling of 811065 in words is "eight hundred eleven thousand, sixty-five".