156120138 has 12 divisors (see below), whose sum is σ = 338260338. Its totient is φ = 52040040.

The previous prime is 156120121. The next prime is 156120179. The reversal of 156120138 is 831021651.

156120138 is a `hidden beast` number, since 15 + 612 + 0 + 1 + 38 = 666.

156120138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 155825289 + 294849 = 12483^2 + 543^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4336653 + ... + 4336688.

Almost surely, 2^156120138 is an apocalyptic number.

156120138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

156120138 is an abundant number, since it is smaller than the sum of its proper divisors (182140200).

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

156120138 is a wasteful number, since it uses less digits than its factorization.

156120138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8673349 (or 8673346 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 156120138 is about 12494.8044402464. The cubic root of 156120138 is about 538.4594155782.

Adding to 156120138 its reverse (831021651), we get a palindrome (987141789).

The spelling of 156120138 in words is "one hundred fifty-six million, one hundred twenty thousand, one hundred thirty-eight".