122815985 has 16 divisors (see below), whose sum is σ = 149299200. Its totient is φ = 96981696.

The previous prime is 122815967. The next prime is 122816011. The reversal of 122815985 is 589518221.

It is a cyclic number.

It is not a de Polignac number, because 122815985 - 2²² = 118621681 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, 170456 + ... + 171174.

It is an arithmetic number, because the mean of its divisors is an integer number (9331200).

Almost surely, 2^122815985 is an apocalyptic number.

It is an amenable number.

122815985 is a deficient number, since it is larger than the sum of its proper divisors (26483215).

122815985 is a wasteful number, since it uses less digits than its factorization.

122815985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its digits is 57600, while the sum is 41.

The square root of 122815985 is about 11082.2373643592. The cubic root of 122815985 is about 497.0708537131.

The spelling of 122815985 in words is "one hundred twenty-two million, eight hundred fifteen thousand, nine hundred eighty-five".