42921872 has 40 divisors (see below), whose sum is σ = 100636416. Its totient is φ = 17312256.

The previous prime is 42921829. The next prime is 42921881. The reversal of 42921872 is 27812924.

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, 9368 + ... + 13175.

Almost surely, 2^42921872 is an apocalyptic number.

It is an amenable number.

42921872 is an abundant number, since it is smaller than the sum of its proper divisors (57714544).

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

42921872 is a wasteful number, since it uses less digits than its factorization.

42921872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22575 (or 22569 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 42921872 is about 6551.4786117334. The cubic root of 42921872 is about 350.1274964077.

The spelling of 42921872 in words is "forty-two million, nine hundred twenty-one thousand, eight hundred seventy-two".