120561915 has 8 divisors (see below), whose sum is σ = 192899088. Its totient is φ = 64299680.

The previous prime is 120561907. The next prime is 120561919. The reversal of 120561915 is 519165021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120561915 - 2³ = 120561907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120561919) 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 7 ways as a sum of consecutive naturals, for example, 4018716 + ... + 4018745.

It is an arithmetic number, because the mean of its divisors is an integer number (24112386).

Almost surely, 2^120561915 is an apocalyptic number.

120561915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120561915 is a deficient number, since it is larger than the sum of its proper divisors (72337173).

120561915 is an equidigital number, since it uses as much as digits as its factorization.

120561915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8037469.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 120561915 is about 10980.0689888543. The cubic root of 120561915 is about 494.0111060352.

The spelling of 120561915 in words is "one hundred twenty million, five hundred sixty-one thousand, nine hundred fifteen".