42561884 has 48 divisors (see below), whose sum is σ = 80424960. Its totient is φ = 19673280.

The previous prime is 42561859. The next prime is 42561899. The reversal of 42561884 is 48816524.

It is a happy number.

Its product of digits (61440) is a multiple of the sum of its prime divisors (256).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390422 + ... + 390530.

It is an arithmetic number, because the mean of its divisors is an integer number (1675520).

Almost surely, 2^42561884 is an apocalyptic number.

It is an amenable number.

42561884 is a deficient number, since it is larger than the sum of its proper divisors (37863076).

42561884 is a wasteful number, since it uses less digits than its factorization.

42561884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 256 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 42561884 is about 6523.9469648365. The cubic root of 42561884 is about 349.1459011263.

The spelling of 42561884 in words is "forty-two million, five hundred sixty-one thousand, eight hundred eighty-four".