42558556 has 48 divisors (see below), whose sum is σ = 82978560. Its totient is φ = 19008000.

The previous prime is 42558553. The next prime is 42558559. The reversal of 42558556 is 65585524.

It is an interprime number because it is at equal distance from previous prime (42558553) and next prime (42558559).

It is a super-2 number, since 2×42558556² = 3622461377610272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42558553) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 169431 + ... + 169681.

It is an arithmetic number, because the mean of its divisors is an integer number (1728720).

Almost surely, 2^42558556 is an apocalyptic number.

42558556 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

42558556 is a deficient number, since it is larger than the sum of its proper divisors (40420004).

42558556 is a wasteful number, since it uses less digits than its factorization.

42558556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its digits is 240000, while the sum is 40.

The square root of 42558556 is about 6523.6918995305. The cubic root of 42558556 is about 349.1368007472.

The spelling of 42558556 in words is "forty-two million, five hundred fifty-eight thousand, five hundred fifty-six".