120856138 has 8 divisors (see below), whose sum is σ = 195229188. Its totient is φ = 55779744.

The previous prime is 120856123. The next prime is 120856139. The reversal of 120856138 is 831658021.

It can be written as a sum of positive squares in 2 ways, for example, as 84217329 + 36638809 = 9177^2 + 6053^2 .

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

It is a super-3 number, since 3×120856138³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (120856139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2324131 + ... + 2324182.

Almost surely, 2^120856138 is an apocalyptic number.

120856138 is a deficient number, since it is larger than the sum of its proper divisors (74373050).

120856138 is a wasteful number, since it uses less digits than its factorization.

120856138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648328.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 120856138 is about 10993.4588733483. The cubic root of 120856138 is about 494.4126461935.

The spelling of 120856138 in words is "one hundred twenty million, eight hundred fifty-six thousand, one hundred thirty-eight".