120661536 has 24 divisors (see below), whose sum is σ = 316736784. Its totient is φ = 40220480.

The previous prime is 120661531. The next prime is 120661553. The reversal of 120661536 is 635166021.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (120661531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 628350 + ... + 628541.

It is an arithmetic number, because the mean of its divisors is an integer number (13197366).

Almost surely, 2^120661536 is an apocalyptic number.

120661536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

120661536 is an abundant number, since it is smaller than the sum of its proper divisors (196075248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120661536 is a wasteful number, since it uses less digits than its factorization.

120661536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256904 (or 1256896 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 120661536 is about 10984.6044990250. The cubic root of 120661536 is about 494.1471366420.

The spelling of 120661536 in words is "one hundred twenty million, six hundred sixty-one thousand, five hundred thirty-six".