865004 has 12 divisors (see below), whose sum is σ = 1730064. Its totient is φ = 370704.

The previous prime is 865003. The next prime is 865043. The reversal of 865004 is 400568.

865004 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (865001) 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 3 ways as a sum of consecutive naturals, for example, 15419 + ... + 15474.

It is an arithmetic number, because the mean of its divisors is an integer number (144172).

2⁸⁶⁵⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

865004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

865004 is a wasteful number, since it uses less digits than its factorization.

865004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30904 (or 30902 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 865004 is about 930.0559122977. The cubic root of 865004 is about 95.2809412135.

The spelling of 865004 in words is "eight hundred sixty-five thousand, four".