120015155 has 32 divisors (see below), whose sum is σ = 165219264. Its totient is φ = 82907136.

The previous prime is 120015149. The next prime is 120015197. The reversal of 120015155 is 551510021.

It is a happy number.

It is not a de Polignac number, because 120015155 - 2¹⁴ = 119998771 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345692 + ... + 346038.

It is an arithmetic number, because the mean of its divisors is an integer number (5163102).

Almost surely, 2^120015155 is an apocalyptic number.

120015155 is a deficient number, since it is larger than the sum of its proper divisors (45204109).

120015155 is a wasteful number, since it uses less digits than its factorization.

120015155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 120015155 is about 10955.1428562114. The cubic root of 120015155 is about 493.2631781276.

Adding to 120015155 its reverse (551510021), we get a palindrome (671525176).

The spelling of 120015155 in words is "one hundred twenty million, fifteen thousand, one hundred fifty-five".