120789155 has 4 divisors (see below), whose sum is σ = 144946992. Its totient is φ = 96631320.

The previous prime is 120789143. The next prime is 120789181. The reversal of 120789155 is 551987021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551987021 = 10691 ⋅51631.

It is not a de Polignac number, because 120789155 - 2⁶ = 120789091 is a prime.

It is a super-2 number, since 2×120789155² = 29180039931228050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12078911 + ... + 12078920.

It is an arithmetic number, because the mean of its divisors is an integer number (36236748).

Almost surely, 2^120789155 is an apocalyptic number.

120789155 is a deficient number, since it is larger than the sum of its proper divisors (24157837).

120789155 is an equidigital number, since it uses as much as digits as its factorization.

120789155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24157836.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 120789155 is about 10990.4119577020. The cubic root of 120789155 is about 494.3212886423.

The spelling of 120789155 in words is "one hundred twenty million, seven hundred eighty-nine thousand, one hundred fifty-five".