642264 has 32 divisors (see below), whose sum is σ = 1835520. Its totient is φ = 183456.

The previous prime is 642253. The next prime is 642281. The reversal of 642264 is 462246.

642264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

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, 1744 + ... + 2079.

It is an arithmetic number, because the mean of its divisors is an integer number (57360).

2⁶⁴²²⁶⁴ is an apocalyptic number.

It is an amenable number.

642264 is an abundant number, since it is smaller than the sum of its proper divisors (1193256).

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

642264 is a wasteful number, since it uses less digits than its factorization.

642264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839 (or 3835 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 642264 is about 801.4137508179. The cubic root of 642264 is about 86.2788855151.

The spelling of 642264 in words is "six hundred forty-two thousand, two hundred sixty-four".