120665220 has 48 divisors (see below), whose sum is σ = 363854400. Its totient is φ = 29702016.

The previous prime is 120665197. The next prime is 120665231. The reversal of 120665220 is 22566021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76570 + ... + 78129.

It is an arithmetic number, because the mean of its divisors is an integer number (7580300).

Almost surely, 2^120665220 is an apocalyptic number.

120665220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120665220 is an abundant number, since it is smaller than the sum of its proper divisors (243189180).

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

120665220 is a wasteful number, since it uses less digits than its factorization.

120665220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154724 (or 154722 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 120665220 is about 10984.7721869869. The cubic root of 120665220 is about 494.1521656391.

The spelling of 120665220 in words is "one hundred twenty million, six hundred sixty-five thousand, two hundred twenty".