864172 has 12 divisors (see below), whose sum is σ = 1553440. Its totient is φ = 420336.

The previous prime is 864169. The next prime is 864191. The reversal of 864172 is 271468.

It is a self number, because there is not a number n which added to its sum of digits gives 864172.

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, 2772 + ... + 3067.

2⁸⁶⁴¹⁷² is an apocalyptic number.

It is an amenable number.

864172 is a deficient number, since it is larger than the sum of its proper divisors (689268).

864172 is a wasteful number, since it uses less digits than its factorization.

864172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880 (or 5878 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 864172 is about 929.6085197544. The cubic root of 864172 is about 95.2503829066.

Subtracting from 864172 its reverse (271468), we obtain a cube (592704 = 84³).

The spelling of 864172 in words is "eight hundred sixty-four thousand, one hundred seventy-two".