864542 has 16 divisors (see below), whose sum is σ = 1523040. Its totient is φ = 360288.

The previous prime is 864541. The next prime is 864551. The reversal of 864542 is 245468.

864542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317 + ... + 1352.

It is an arithmetic number, because the mean of its divisors is an integer number (95190).

2⁸⁶⁴⁵⁴² is an apocalyptic number.

864542 is a deficient number, since it is larger than the sum of its proper divisors (658498).

864542 is a wasteful number, since it uses less digits than its factorization.

864542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715.

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

The square root of 864542 is about 929.8075069604. The cubic root of 864542 is about 95.2639749589.

The spelling of 864542 in words is "eight hundred sixty-four thousand, five hundred forty-two".