642524 has 18 divisors (see below), whose sum is σ = 1170624. Its totient is φ = 308560.

The previous prime is 642517. The next prime is 642527. The reversal of 642524 is 425246.

It is a self number, because there is not a number n which added to its sum of digits gives 642524.

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 642524.

It is not an unprimeable number, because it can be changed into a prime (642527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3269 + ... + 3459.

2⁶⁴²⁵²⁴ is an apocalyptic number.

It is an amenable number.

642524 is a deficient number, since it is larger than the sum of its proper divisors (528100).

642524 is a wasteful number, since it uses less digits than its factorization.

642524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 222 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 642524 is about 801.5759477429. The cubic root of 642524 is about 86.2905263585.

The spelling of 642524 in words is "six hundred forty-two thousand, five hundred twenty-four".