865244 has 12 divisors (see below), whose sum is σ = 1566600. Its totient is φ = 417648.

The previous prime is 865231. The next prime is 865247. The reversal of 865244 is 442568.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865247) by changing a digit.

865244 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 3 ways as a sum of consecutive naturals, for example, 3614 + ... + 3845.

It is an arithmetic number, because the mean of its divisors is an integer number (130550).

2⁸⁶⁵²⁴⁴ is an apocalyptic number.

It is an amenable number.

865244 is a deficient number, since it is larger than the sum of its proper divisors (701356).

865244 is a wasteful number, since it uses less digits than its factorization.

865244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7492 (or 7490 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 865244 is about 930.1849278504. The cubic root of 865244 is about 95.2897524681.

The spelling of 865244 in words is "eight hundred sixty-five thousand, two hundred forty-four".