42085131 has 24 divisors (see below), whose sum is σ = 62103552. Its totient is φ = 25330800.

The previous prime is 42085129. The next prime is 42085139. The reversal of 42085131 is 13158024.

It is not a de Polignac number, because 42085131 - 2¹ = 42085129 is a prime.

It is a super-2 number, since 2×42085131² = 3542316502574322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42085139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69030 + ... + 69636.

It is an arithmetic number, because the mean of its divisors is an integer number (2587648).

Almost surely, 2^42085131 is an apocalyptic number.

42085131 is a deficient number, since it is larger than the sum of its proper divisors (20018421).

42085131 is a wasteful number, since it uses less digits than its factorization.

42085131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 42085131 is about 6487.3053728031. The cubic root of 42085131 is about 347.8373612462.

It can be divided in two parts, 4208 and 5131, that added together give a palindrome (9339).

The spelling of 42085131 in words is "forty-two million, eighty-five thousand, one hundred thirty-one".