642504 has 32 divisors (see below), whose sum is σ = 1692000. Its totient is φ = 202752.

The previous prime is 642487. The next prime is 642517. The reversal of 642504 is 405246.

It is a happy number.

642504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×642504² = 825622780032, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642504.

It is an unprimeable number.

642504 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (52875).

2⁶⁴²⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

642504 is an abundant number, since it is smaller than the sum of its proper divisors (1049496).

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

642504 is a wasteful number, since it uses less digits than its factorization.

642504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 642504 is about 801.5634722216. The cubic root of 642504 is about 86.2896310205.

The spelling of 642504 in words is "six hundred forty-two thousand, five hundred four".