42805556 has 24 divisors (see below), whose sum is σ = 80347680. Its totient is φ = 19891872.

The previous prime is 42805487. The next prime is 42805561. The reversal of 42805556 is 65550824.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 9341.

It is an arithmetic number, because the mean of its divisors is an integer number (3347820).

Almost surely, 2^42805556 is an apocalyptic number.

It is an amenable number.

42805556 is a deficient number, since it is larger than the sum of its proper divisors (37542124).

42805556 is a wasteful number, since it uses less digits than its factorization.

42805556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10703 (or 10701 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 42805556 is about 6542.5955094290. The cubic root of 42805556 is about 349.8109346225.

The spelling of 42805556 in words is "forty-two million, eight hundred five thousand, five hundred fifty-six".