642924 has 24 divisors (see below), whose sum is σ = 1667120. Its totient is φ = 214272.

The previous prime is 642907. The next prime is 642931. The reversal of 642924 is 429246.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642924.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869 + ... + 3084.

2⁶⁴²⁹²⁴ is an apocalyptic number.

It is an amenable number.

642924 is an abundant number, since it is smaller than the sum of its proper divisors (1024196).

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

642924 is a wasteful number, since it uses less digits than its factorization.

642924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966 (or 5958 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 642924 is about 801.8254174071. The cubic root of 642924 is about 86.3084292178.

The spelling of 642924 in words is "six hundred forty-two thousand, nine hundred twenty-four".