865772 has 12 divisors (see below), whose sum is σ = 1530816. Its totient is φ = 428400.

The previous prime is 865771. The next prime is 865783. The reversal of 865772 is 277568.

It is a super-2 number, since 2×865772² = 1499122311968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668 + ... + 1475.

It is an arithmetic number, because the mean of its divisors is an integer number (127568).

2⁸⁶⁵⁷⁷² is an apocalyptic number.

It is an amenable number.

865772 is a deficient number, since it is larger than the sum of its proper divisors (665044).

865772 is a wasteful number, since it uses less digits than its factorization.

865772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 2246 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 865772 is about 930.4686990974. The cubic root of 865772 is about 95.3091314943.

The spelling of 865772 in words is "eight hundred sixty-five thousand, seven hundred seventy-two".