642584 has 16 divisors (see below), whose sum is σ = 1231200. Its totient is φ = 314272.

The previous prime is 642581. The next prime is 642613. The reversal of 642584 is 485246.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642584.

It is not an unprimeable number, because it can be changed into a prime (642581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479 + ... + 1230.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2⁶⁴²⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

642584 is a deficient number, since it is larger than the sum of its proper divisors (588616).

642584 is a wasteful number, since it uses less digits than its factorization.

642584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762 (or 1758 counting only the distinct ones).

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

The square root of 642584 is about 801.6133731419. The cubic root of 642584 is about 86.2932122610.

The spelling of 642584 in words is "six hundred forty-two thousand, five hundred eighty-four".