42556672 has 18 divisors (see below), whose sum is σ = 84947618. Its totient is φ = 21278208.

The previous prime is 42556649. The next prime is 42556681. The reversal of 42556672 is 27665524.

It can be written as a sum of positive squares in only one way, i.e., 24443136 + 18113536 = 4944^2 + 4256^2 .

It is a super-2 number, since 2×42556672² = 3622140663431168, 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, 82863 + ... + 83374.

Almost surely, 2^42556672 is an apocalyptic number.

It is an amenable number.

42556672 is a deficient number, since it is larger than the sum of its proper divisors (42390946).

42556672 is an equidigital number, since it uses as much as digits as its factorization.

42556672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166253 (or 166239 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 42556672 is about 6523.5475011684. The cubic root of 42556672 is about 349.1316487597.

The spelling of 42556672 in words is "forty-two million, five hundred fifty-six thousand, six hundred seventy-two".