42531392 has 28 divisors (see below), whose sum is σ = 85159596. Its totient is φ = 21073920.

The previous prime is 42531373. The next prime is 42531413. The reversal of 42531392 is 29313524.

It can be written as a sum of positive squares in 2 ways, for example, as 15241216 + 27290176 = 3904^2 + 5224^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4292 + ... + 10172.

Almost surely, 2^42531392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42531392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42579798).

42531392 is an abundant number, since it is smaller than the sum of its proper divisors (42628204).

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

42531392 is a wasteful number, since it uses less digits than its factorization.

42531392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6006 (or 5996 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 42531392 is about 6521.6096172647. The cubic root of 42531392 is about 349.0625033442.

The spelling of 42531392 in words is "forty-two million, five hundred thirty-one thousand, three hundred ninety-two".