42642556 has 24 divisors (see below), whose sum is σ = 81575424. Its totient is φ = 19343280.

The previous prime is 42642547. The next prime is 42642563. The reversal of 42642556 is 65524624.

42642556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37411 + ... + 38533.

It is an arithmetic number, because the mean of its divisors is an integer number (3398976).

Almost surely, 2^42642556 is an apocalyptic number.

It is an amenable number.

42642556 is a deficient number, since it is larger than the sum of its proper divisors (38932868).

42642556 is a wasteful number, since it uses less digits than its factorization.

42642556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001 (or 1999 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The square root of 42642556 is about 6530.1267981564. The cubic root of 42642556 is about 349.3663528442.

The spelling of 42642556 in words is "forty-two million, six hundred forty-two thousand, five hundred fifty-six".