42189256 has 8 divisors (see below), whose sum is σ = 79104870. Its totient is φ = 21094624.

The previous prime is 42189211. The next prime is 42189263. The reversal of 42189256 is 65298124.

It can be written as a sum of positive squares in only one way, i.e., 41602500 + 586756 = 6450^2 + 766^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2636821 + ... + 2636836.

Almost surely, 2^42189256 is an apocalyptic number.

It is an amenable number.

42189256 is a deficient number, since it is larger than the sum of its proper divisors (36915614).

42189256 is a wasteful number, since it uses less digits than its factorization.

42189256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273663 (or 5273659 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 42189256 is about 6495.3257039197. The cubic root of 42189256 is about 348.1239924569.

The spelling of 42189256 in words is "forty-two million, one hundred eighty-nine thousand, two hundred fifty-six".