42531545 has 16 divisors (see below), whose sum is σ = 60341760. Its totient is φ = 28158144.

The previous prime is 42531539. The next prime is 42531547. The reversal of 42531545 is 54513524.

It is not a de Polignac number, because 42531545 - 2⁸ = 42531289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

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 in 15 ways as a sum of consecutive naturals, for example, 19937 + ... + 21966.

It is an arithmetic number, because the mean of its divisors is an integer number (3771360).

Almost surely, 2^42531545 is an apocalyptic number.

It is an amenable number.

42531545 is a deficient number, since it is larger than the sum of its proper divisors (17810215).

42531545 is a wasteful number, since it uses less digits than its factorization.

42531545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41944.

The product of its digits is 12000, while the sum is 29.

The square root of 42531545 is about 6521.6213474871. The cubic root of 42531545 is about 349.0629219095.

The spelling of 42531545 in words is "forty-two million, five hundred thirty-one thousand, five hundred forty-five".