122538857 has 12 divisors (see below), whose sum is σ = 146399940. Its totient is φ = 102193056.

The previous prime is 122538821. The next prime is 122538859. The reversal of 122538857 is 758835221.

It can be written as a sum of positive squares in 2 ways, for example, as 90231001 + 32307856 = 9499^2 + 5684^2 .

It is not a de Polignac number, because 122538857 - 2²² = 118344553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122538859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31982 + ... + 35607.

It is an arithmetic number, because the mean of its divisors is an integer number (12199995).

Almost surely, 2^122538857 is an apocalyptic number.

It is an amenable number.

122538857 is a deficient number, since it is larger than the sum of its proper divisors (23861083).

122538857 is an equidigital number, since it uses as much as digits as its factorization.

122538857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67640 (or 67633 counting only the distinct ones).

The product of its digits is 134400, while the sum is 41.

The square root of 122538857 is about 11069.7270517389. The cubic root of 122538857 is about 496.6967004845.

The spelling of 122538857 in words is "one hundred twenty-two million, five hundred thirty-eight thousand, eight hundred fifty-seven".