120815189 has 16 divisors (see below), whose sum is σ = 137704320. Its totient is φ = 104986560.

The previous prime is 120815087. The next prime is 120815203. The reversal of 120815189 is 981518021.

It is a cyclic number.

It is not a de Polignac number, because 120815189 - 2²⁰ = 119766613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120815689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31019 + ... + 34695.

It is an arithmetic number, because the mean of its divisors is an integer number (8606520).

Almost surely, 2^120815189 is an apocalyptic number.

It is an amenable number.

120815189 is a deficient number, since it is larger than the sum of its proper divisors (16889131).

120815189 is a wasteful number, since it uses less digits than its factorization.

120815189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820.

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 120815189 is about 10991.5962898935. The cubic root of 120815189 is about 494.3568002078.

The spelling of 120815189 in words is "one hundred twenty million, eight hundred fifteen thousand, one hundred eighty-nine".