120615655 has 4 divisors (see below), whose sum is σ = 144738792. Its totient is φ = 96492520.

The previous prime is 120615641. The next prime is 120615679. The reversal of 120615655 is 556516021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556516021 = 89 ⋅6252989.

It is not a de Polignac number, because 120615655 - 2¹⁷ = 120484583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12061561 + ... + 12061570.

It is an arithmetic number, because the mean of its divisors is an integer number (36184698).

Almost surely, 2^120615655 is an apocalyptic number.

120615655 is a deficient number, since it is larger than the sum of its proper divisors (24123137).

120615655 is an equidigital number, since it uses as much as digits as its factorization.

120615655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24123136.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 120615655 is about 10982.5158775210. The cubic root of 120615655 is about 494.0844963017.

It can be divided in two parts, 1206 and 15655, that added together give a palindrome (16861).

The spelling of 120615655 in words is "one hundred twenty million, six hundred fifteen thousand, six hundred fifty-five".