120556287 has 12 divisors (see below), whose sum is σ = 175467864. Its totient is φ = 79756560.

The previous prime is 120556283. The next prime is 120556309. The reversal of 120556287 is 782655021.

It is a happy number.

120556287 is a `hidden beast` number, since 1 + 20 + 5 + 5 + 628 + 7 = 666.

It is not a de Polignac number, because 120556287 - 2² = 120556283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120556283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49948 + ... + 52305.

It is an arithmetic number, because the mean of its divisors is an integer number (14622322).

Almost surely, 2^120556287 is an apocalyptic number.

120556287 is a deficient number, since it is larger than the sum of its proper divisors (54911577).

120556287 is a wasteful number, since it uses less digits than its factorization.

120556287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102390 (or 102387 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 120556287 is about 10979.8127033206. The cubic root of 120556287 is about 494.0034188708.

The spelling of 120556287 in words is "one hundred twenty million, five hundred fifty-six thousand, two hundred eighty-seven".