120561255 has 12 divisors (see below), whose sum is σ = 208972920. Its totient is φ = 64299312.

The previous prime is 120561247. The next prime is 120561257. The reversal of 120561255 is 552165021.

It is not a de Polignac number, because 120561255 - 2³ = 120561247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120561257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1339525 + ... + 1339614.

It is an arithmetic number, because the mean of its divisors is an integer number (17414410).

Almost surely, 2^120561255 is an apocalyptic number.

120561255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120561255 is a deficient number, since it is larger than the sum of its proper divisors (88411665).

120561255 is a wasteful number, since it uses less digits than its factorization.

120561255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679150 (or 2679147 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 120561255 is about 10980.0389343572. The cubic root of 120561255 is about 494.0102045677.

The spelling of 120561255 in words is "one hundred twenty million, five hundred sixty-one thousand, two hundred fifty-five".