42531534 has 16 divisors (see below), whose sum is σ = 94514640. Its totient is φ = 14177160.

The previous prime is 42531527. The next prime is 42531539. The reversal of 42531534 is 43513524.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 42531498 and 42531507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393757 + ... + 393864.

It is an arithmetic number, because the mean of its divisors is an integer number (5907165).

Almost surely, 2^42531534 is an apocalyptic number.

42531534 is an abundant number, since it is smaller than the sum of its proper divisors (51983106).

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

42531534 is a wasteful number, since it uses less digits than its factorization.

42531534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787632 (or 787626 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 42531534 is about 6521.6205041385. The cubic root of 42531534 is about 349.0628918166.

The spelling of 42531534 in words is "forty-two million, five hundred thirty-one thousand, five hundred thirty-four".