120820385 has 16 divisors (see below), whose sum is σ = 166801152. Its totient is φ = 82296000.

The previous prime is 120820379. The next prime is 120820393. The reversal of 120820385 is 583028021.

It is not a de Polignac number, because 120820385 - 2⁴ = 120820369 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6146 + ... + 16715.

It is an arithmetic number, because the mean of its divisors is an integer number (10425072).

Almost surely, 2^120820385 is an apocalyptic number.

It is an amenable number.

120820385 is a deficient number, since it is larger than the sum of its proper divisors (45980767).

120820385 is a wasteful number, since it uses less digits than its factorization.

120820385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23024.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 120820385 is about 10991.8326497450. The cubic root of 120820385 is about 494.3638871785.

The spelling of 120820385 in words is "one hundred twenty million, eight hundred twenty thousand, three hundred eighty-five".