865164 has 24 divisors (see below), whose sum is σ = 2137968. Its totient is φ = 271360.

The previous prime is 865159. The next prime is 865177. The reversal of 865164 is 461568.

865164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 865164.

It is an unprimeable number.

865164 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1917 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (89082).

2⁸⁶⁵¹⁶⁴ is an apocalyptic number.

It is an amenable number.

865164 is an abundant number, since it is smaller than the sum of its proper divisors (1272804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865164 is a wasteful number, since it uses less digits than its factorization.

865164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265 (or 4263 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 865164 is about 930.1419246545. The cubic root of 865164 is about 95.2868155643.

The spelling of 865164 in words is "eight hundred sixty-five thousand, one hundred sixty-four".