864975 has 24 divisors (see below), whose sum is σ = 1507840. Its totient is φ = 436320.

The previous prime is 864967. The next prime is 864979. The reversal of 864975 is 579468.

It is not a de Polignac number, because 864975 - 2³ = 864967 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1122 + ... + 1728.

2⁸⁶⁴⁹⁷⁵ is an apocalyptic number.

864975 is a deficient number, since it is larger than the sum of its proper divisors (642865).

864975 is a wasteful number, since it uses less digits than its factorization.

864975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 634 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 864975 is about 930.0403217065. The cubic root of 864975 is about 95.2798764099.

The spelling of 864975 in words is "eight hundred sixty-four thousand, nine hundred seventy-five".