120120555 has 16 divisors (see below), whose sum is σ = 203498784. Its totient is φ = 60295680.

The previous prime is 120120509. The next prime is 120120563. The reversal of 120120555 is 555021021.

It is not a de Polignac number, because 120120555 - 2⁶ = 120120491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235276 + ... + 235785.

It is an arithmetic number, because the mean of its divisors is an integer number (12718674).

Almost surely, 2^120120555 is an apocalyptic number.

120120555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120120555 is a deficient number, since it is larger than the sum of its proper divisors (83378229).

120120555 is a wasteful number, since it uses less digits than its factorization.

120120555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471086.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 120120555 is about 10959.9523265387. The cubic root of 120120555 is about 493.4075341378.

Adding to 120120555 its reverse (555021021), we get a palindrome (675141576).

The spelling of 120120555 in words is "one hundred twenty million, one hundred twenty thousand, five hundred fifty-five".