42556798 has 4 divisors (see below), whose sum is σ = 63835200. Its totient is φ = 21278398.

The previous prime is 42556781. The next prime is 42556823. The reversal of 42556798 is 89765524.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×42556798² = 3622162112025608, 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, 10639198 + ... + 10639201.

It is an arithmetic number, because the mean of its divisors is an integer number (15958800).

Almost surely, 2^42556798 is an apocalyptic number.

42556798 is a deficient number, since it is larger than the sum of its proper divisors (21278402).

42556798 is a wasteful number, since it uses less digits than its factorization.

42556798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21278401.

The product of its digits is 604800, while the sum is 46.

The square root of 42556798 is about 6523.5571584834. The cubic root of 42556798 is about 349.1319933241.

The spelling of 42556798 in words is "forty-two million, five hundred fifty-six thousand, seven hundred ninety-eight".