120166138 has 4 divisors (see below), whose sum is σ = 180249210. Its totient is φ = 60083068.

The previous prime is 120166129. The next prime is 120166139. The reversal of 120166138 is 831661021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 109558089 + 10608049 = 10467^2 + 3257^2 .

It is not an unprimeable number, because it can be changed into a prime (120166139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30041533 + ... + 30041536.

Almost surely, 2^120166138 is an apocalyptic number.

120166138 is a deficient number, since it is larger than the sum of its proper divisors (60083072).

120166138 is an equidigital number, since it uses as much as digits as its factorization.

120166138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60083071.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 120166138 is about 10962.0316547618. The cubic root of 120166138 is about 493.4699385317.

The spelling of 120166138 in words is "one hundred twenty million, one hundred sixty-six thousand, one hundred thirty-eight".