864574 has 4 divisors (see below), whose sum is σ = 1296864. Its totient is φ = 432286.

The previous prime is 864551. The next prime is 864581. The reversal of 864574 is 475468.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

864574 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216142 + ... + 216145.

It is an arithmetic number, because the mean of its divisors is an integer number (324216).

2⁸⁶⁴⁵⁷⁴ is an apocalyptic number.

864574 is a deficient number, since it is larger than the sum of its proper divisors (432290).

864574 is a wasteful number, since it uses less digits than its factorization.

864574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432289.

The product of its digits is 26880, while the sum is 34.

The square root of 864574 is about 929.8247146640. The cubic root of 864574 is about 95.2651503056.

The spelling of 864574 in words is "eight hundred sixty-four thousand, five hundred seventy-four".