42665856 has 32 divisors (see below), whose sum is σ = 113332200. Its totient is φ = 14221824.

The previous prime is 42665807. The next prime is 42665867. The reversal of 42665856 is 65856624.

42665856 = 274² + 275² + ... + 529².

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent 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, 55171 + ... + 55938.

Almost surely, 2^42665856 is an apocalyptic number.

It is an amenable number.

42665856 is an abundant number, since it is smaller than the sum of its proper divisors (70666344).

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

42665856 is a wasteful number, since it uses less digits than its factorization.

42665856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111126 (or 111114 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 42665856 is about 6531.9105933869. The cubic root of 42665856 is about 349.4299728100.

The spelling of 42665856 in words is "forty-two million, six hundred sixty-five thousand, eight hundred fifty-six".