120681520 has 20 divisors (see below), whose sum is σ = 280584720. Its totient is φ = 48272576.

The previous prime is 120681503. The next prime is 120681527. The reversal of 120681520 is 25186021.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (120681527) 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, 754180 + ... + 754339.

It is an arithmetic number, because the mean of its divisors is an integer number (14029236).

Almost surely, 2^120681520 is an apocalyptic number.

120681520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120681520 is an abundant number, since it is smaller than the sum of its proper divisors (159903200).

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

120681520 is a wasteful number, since it uses less digits than its factorization.

120681520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508532 (or 1508526 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 120681520 is about 10985.5140981203. The cubic root of 120681520 is about 494.1744154021.

The spelling of 120681520 in words is "one hundred twenty million, six hundred eighty-one thousand, five hundred twenty".