122560857 has 20 divisors (see below), whose sum is σ = 186545700. Its totient is φ = 80162784.

The previous prime is 122560843. The next prime is 122560883. The reversal of 122560857 is 758065221.

It is a happy number.

122560857 is a `hidden beast` number, since 12 + 2 + 560 + 85 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 54597321 + 67963536 = 7389^2 + 8244^2 .

It is not a de Polignac number, because 122560857 - 2⁷ = 122560729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122560057) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 9982 + ... + 18567.

It is an arithmetic number, because the mean of its divisors is an integer number (9327285).

Almost surely, 2^122560857 is an apocalyptic number.

It is an amenable number.

122560857 is a deficient number, since it is larger than the sum of its proper divisors (63984843).

122560857 is an equidigital number, since it uses as much as digits as its factorization.

122560857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28614 (or 28605 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 122560857 is about 11070.7207082466. The cubic root of 122560857 is about 496.7264235013.

The spelling of 122560857 in words is "one hundred twenty-two million, five hundred sixty thousand, eight hundred fifty-seven".