42556506 has 8 divisors (see below), whose sum is σ = 85113024. Its totient is φ = 14185500.

The previous prime is 42556499. The next prime is 42556567. The reversal of 42556506 is 60565524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

42556506 is an admirable number.

It is a super-2 number, since 2×42556506² = 3622112405856072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3546370 + ... + 3546381.

It is an arithmetic number, because the mean of its divisors is an integer number (10639128).

Almost surely, 2^42556506 is an apocalyptic number.

42556506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42556506 is a wasteful number, since it uses less digits than its factorization.

42556506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7092756.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 42556506 is about 6523.5347780172. The cubic root of 42556506 is about 349.1311948087.

The spelling of 42556506 in words is "forty-two million, five hundred fifty-six thousand, five hundred six".