42556930 has 32 divisors (see below), whose sum is σ = 83253744. Its totient is φ = 15568896.

The previous prime is 42556909. The next prime is 42556931. The reversal of 42556930 is 3965524.

It can be written as a sum of positive squares in 8 ways, for example, as 33489 + 42523441 = 183^2 + 6521^2 .

It is a super-2 number, since 2×42556930² = 3622184582049800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42556931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13242 + ... + 16138.

Almost surely, 2^42556930 is an apocalyptic number.

42556930 is a deficient number, since it is larger than the sum of its proper divisors (40696814).

42556930 is a wasteful number, since it uses less digits than its factorization.

42556930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 42556930 is about 6523.5672756552. The cubic root of 42556930 is about 349.1323542956.

The spelling of 42556930 in words is "forty-two million, five hundred fifty-six thousand, nine hundred thirty".