42138572 has 12 divisors (see below), whose sum is σ = 84277200. Its totient is φ = 18059376.

The previous prime is 42138559. The next prime is 42138587. The reversal of 42138572 is 27583124.

42138572 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752447 + ... + 752502.

It is an arithmetic number, because the mean of its divisors is an integer number (7023100).

Almost surely, 2^42138572 is an apocalyptic number.

It is an amenable number.

42138572 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42138572 is a wasteful number, since it uses less digits than its factorization.

42138572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504960 (or 1504958 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 42138572 is about 6491.4229564865. The cubic root of 42138572 is about 347.9845305142.

The spelling of 42138572 in words is "forty-two million, one hundred thirty-eight thousand, five hundred seventy-two".