42557972 has 6 divisors (see below), whose sum is σ = 74476458. Its totient is φ = 21278984.

The previous prime is 42557923. The next prime is 42558007. The reversal of 42557972 is 27975524.

It can be written as a sum of positive squares in only one way, i.e., 27081616 + 15476356 = 5204^2 + 3934^2 .

It is a super-2 number, since 2×42557972² = 3622361961505568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5319743 + ... + 5319750.

It is an arithmetic number, because the mean of its divisors is an integer number (12412743).

Almost surely, 2^42557972 is an apocalyptic number.

It is an amenable number.

42557972 is a deficient number, since it is larger than the sum of its proper divisors (31918486).

42557972 is a wasteful number, since it uses less digits than its factorization.

42557972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10639497 (or 10639495 counting only the distinct ones).

The product of its digits is 176400, while the sum is 41.

The square root of 42557972 is about 6523.6471394458. The cubic root of 42557972 is about 349.1352037567.

The spelling of 42557972 in words is "forty-two million, five hundred fifty-seven thousand, nine hundred seventy-two".