865136 has 20 divisors (see below), whose sum is σ = 1692600. Its totient is φ = 428352.

The previous prime is 865121. The next prime is 865153. The reversal of 865136 is 631568.

865136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 865099 and 865108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2030 + ... + 2418.

It is an arithmetic number, because the mean of its divisors is an integer number (84630).

2⁸⁶⁵¹³⁶ is an apocalyptic number.

It is an amenable number.

865136 is a deficient number, since it is larger than the sum of its proper divisors (827464).

865136 is a wasteful number, since it uses less digits than its factorization.

865136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536 (or 530 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 865136 is about 930.1268730663. The cubic root of 865136 is about 95.2857876052.

It can be divided in two parts, 865 and 136, that added together give a palindrome (1001).

The spelling of 865136 in words is "eight hundred sixty-five thousand, one hundred thirty-six".