120256556 has 12 divisors (see below), whose sum is σ = 240513168. Its totient is φ = 51538512.

The previous prime is 120256537. The next prime is 120256561. The reversal of 120256556 is 655652021.

120256556 is an admirable number.

It is a super-2 number, since 2×120256556² = 28923278521962272, which contains 22 as substring.

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, 2147411 + ... + 2147466.

It is an arithmetic number, because the mean of its divisors is an integer number (20042764).

Almost surely, 2^120256556 is an apocalyptic number.

It is an amenable number.

120256556 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.

120256556 is a wasteful number, since it uses less digits than its factorization.

120256556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294888 (or 4294886 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 120256556 is about 10966.1550235258. The cubic root of 120256556 is about 493.5936766035.

It can be divided in two parts, 12025 and 6556, that added together give a palindrome (18581).

The spelling of 120256556 in words is "one hundred twenty million, two hundred fifty-six thousand, five hundred fifty-six".