865953 has 12 divisors (see below), whose sum is σ = 1364688. Its totient is φ = 524760.

The previous prime is 865937. The next prime is 865957. The reversal of 865953 is 359568.

865953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 865953 - 2⁴ = 865937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4275 + ... + 4472.

It is an arithmetic number, because the mean of its divisors is an integer number (113724).

2⁸⁶⁵⁹⁵³ is an apocalyptic number.

It is an amenable number.

865953 is a deficient number, since it is larger than the sum of its proper divisors (498735).

865953 is a wasteful number, since it uses less digits than its factorization.

865953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764 (or 8761 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 865953 is about 930.5659568241. The cubic root of 865953 is about 95.3157728698.

The spelling of 865953 in words is "eight hundred sixty-five thousand, nine hundred fifty-three".