120520655 has 16 divisors (see below), whose sum is σ = 149697504. Its totient is φ = 93075840.

The previous prime is 120520651. The next prime is 120520661. The reversal of 120520655 is 556025021.

It is not a de Polignac number, because 120520655 - 2² = 120520651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120520651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21749 + ... + 26721.

It is an arithmetic number, because the mean of its divisors is an integer number (9356094).

Almost surely, 2^120520655 is an apocalyptic number.

120520655 is a deficient number, since it is larger than the sum of its proper divisors (29176849).

120520655 is a wasteful number, since it uses less digits than its factorization.

120520655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 120520655 is about 10978.1899692071. The cubic root of 120520655 is about 493.9547443340.

Adding to 120520655 its reverse (556025021), we get a palindrome (676545676).

The spelling of 120520655 in words is "one hundred twenty million, five hundred twenty thousand, six hundred fifty-five".