864042 has 32 divisors (see below), whose sum is σ = 1881792. Its totient is φ = 263424.

The previous prime is 864037. The next prime is 864047. The reversal of 864042 is 240468.

It is an interprime number because it is at equal distance from previous prime (864037) and next prime (864047).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864047) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 4288 + ... + 4484.

It is an arithmetic number, because the mean of its divisors is an integer number (58806).

2⁸⁶⁴⁰⁴² is an apocalyptic number.

864042 is an abundant number, since it is smaller than the sum of its proper divisors (1017750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864042 is a wasteful number, since it uses less digits than its factorization.

864042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 864042 is about 929.5385952181. The cubic root of 864042 is about 95.2456063997.

The spelling of 864042 in words is "eight hundred sixty-four thousand, forty-two".