42170572 has 12 divisors (see below), whose sum is σ = 73995880. Its totient is φ = 21028896.

The previous prime is 42170561. The next prime is 42170593. The reversal of 42170572 is 27507124.

It is a self number, because there is not a number n which added to its sum of digits gives 42170572.

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, 12393 + ... + 15424.

Almost surely, 2^42170572 is an apocalyptic number.

It is an amenable number.

42170572 is a deficient number, since it is larger than the sum of its proper divisors (31825308).

42170572 is a wasteful number, since it uses less digits than its factorization.

42170572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28200 (or 28198 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 42170572 is about 6493.8872795884. The cubic root of 42170572 is about 348.0725946232.

Adding to 42170572 its reverse (27507124), we get a palindrome (69677696).

The spelling of 42170572 in words is "forty-two million, one hundred seventy thousand, five hundred seventy-two".