642574 has 16 divisors (see below), whose sum is σ = 1026720. Its totient is φ = 300960.

The previous prime is 642563. The next prime is 642581. The reversal of 642574 is 475246.

642574 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2692 + ... + 2920.

It is an arithmetic number, because the mean of its divisors is an integer number (64170).

2⁶⁴²⁵⁷⁴ is an apocalyptic number.

642574 is a deficient number, since it is larger than the sum of its proper divisors (384146).

642574 is a wasteful number, since it uses less digits than its factorization.

642574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315.

The product of its digits is 6720, while the sum is 28.

The square root of 642574 is about 801.6071356968. The cubic root of 642574 is about 86.2927646222.

It can be divided in two parts, 64257 and 4, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 642574 in words is "six hundred forty-two thousand, five hundred seventy-four".