42531542 has 4 divisors (see below), whose sum is σ = 63797316. Its totient is φ = 21265770.

The previous prime is 42531539. The next prime is 42531547. The reversal of 42531542 is 24513524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10632884 + ... + 10632887.

It is an arithmetic number, because the mean of its divisors is an integer number (15949329).

Almost surely, 2^42531542 is an apocalyptic number.

42531542 is a deficient number, since it is larger than the sum of its proper divisors (21265774).

42531542 is a wasteful number, since it uses less digits than its factorization.

42531542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21265773.

The product of its digits is 4800, while the sum is 26.

The square root of 42531542 is about 6521.6211174830. The cubic root of 42531542 is about 349.0629137024.

The spelling of 42531542 in words is "forty-two million, five hundred thirty-one thousand, five hundred forty-two".