120661155 has 48 divisors (see below), whose sum is σ = 226908864. Its totient is φ = 59074560.

The previous prime is 120661133. The next prime is 120661193. The reversal of 120661155 is 551166021.

It is a happy number.

It is not a de Polignac number, because 120661155 - 2⁹ = 120660643 is a prime.

It is a super-2 number, since 2×120661155² = 29118228651868050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29442 + ... + 33288.

It is an arithmetic number, because the mean of its divisors is an integer number (4727268).

Almost surely, 2^120661155 is an apocalyptic number.

120661155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120661155 is a deficient number, since it is larger than the sum of its proper divisors (106247709).

120661155 is a wasteful number, since it uses less digits than its factorization.

120661155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3916 (or 3913 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 120661155 is about 10984.5871565571. The cubic root of 120661155 is about 494.1466165363.

The spelling of 120661155 in words is "one hundred twenty million, six hundred sixty-one thousand, one hundred fifty-five".