42139916 has 24 divisors (see below), whose sum is σ = 90763680. Its totient is φ = 16670592.

The previous prime is 42139913. The next prime is 42139931. The reversal of 42139916 is 61993124.

It is not an unprimeable number, because it can be changed into a prime (42139913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57521 + ... + 58248.

It is an arithmetic number, because the mean of its divisors is an integer number (3781820).

Almost surely, 2^42139916 is an apocalyptic number.

It is an amenable number.

42139916 is an abundant number, since it is smaller than the sum of its proper divisors (48623764).

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

42139916 is a wasteful number, since it uses less digits than its factorization.

42139916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115793 (or 115791 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 42139916 is about 6491.5264768774. The cubic root of 42139916 is about 347.9882301035.

The spelling of 42139916 in words is "forty-two million, one hundred thirty-nine thousand, nine hundred sixteen".