642474 has 24 divisors (see below), whose sum is σ = 1591200. Its totient is φ = 183528.

The previous prime is 642457. The next prime is 642487. The reversal of 642474 is 474246.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 642474.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2424 + ... + 2675.

It is an arithmetic number, because the mean of its divisors is an integer number (66300).

2⁶⁴²⁴⁷⁴ is an apocalyptic number.

642474 is an abundant number, since it is smaller than the sum of its proper divisors (948726).

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

642474 is a wasteful number, since it uses less digits than its factorization.

642474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114 (or 5111 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 642474 is about 801.5447585756. The cubic root of 642474 is about 86.2882879787.

The spelling of 642474 in words is "six hundred forty-two thousand, four hundred seventy-four".