120406556 has 12 divisors (see below), whose sum is σ = 211533168. Its totient is φ = 59968512.

The previous prime is 120406519. The next prime is 120406567. The reversal of 120406556 is 655604021.

It is a super-2 number, since 2×120406556² = 28995477455562272, 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 in 3 ways as a sum of consecutive naturals, for example, 57536 + ... + 59591.

It is an arithmetic number, because the mean of its divisors is an integer number (17627764).

Almost surely, 2^120406556 is an apocalyptic number.

It is an amenable number.

120406556 is a deficient number, since it is larger than the sum of its proper divisors (91126612).

120406556 is a wasteful number, since it uses less digits than its factorization.

120406556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117388 (or 117386 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 120406556 is about 10972.9921170117. The cubic root of 120406556 is about 493.7988166016.

The spelling of 120406556 in words is "one hundred twenty million, four hundred six thousand, five hundred fifty-six".