122810857 has 4 divisors (see below), whose sum is σ = 132257860. Its totient is φ = 113363856.

The previous prime is 122810843. The next prime is 122810921. The reversal of 122810857 is 758018221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51897616 + 70913241 = 7204^2 + 8421^2 .

It is a cyclic number.

It is not a de Polignac number, because 122810857 - 2⁷ = 122810729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122810837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4723482 + ... + 4723507.

It is an arithmetic number, because the mean of its divisors is an integer number (33064465).

Almost surely, 2^122810857 is an apocalyptic number.

It is an amenable number.

122810857 is a deficient number, since it is larger than the sum of its proper divisors (9447003).

122810857 is an equidigital number, since it uses as much as digits as its factorization.

122810857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9447002.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 122810857 is about 11082.0060007203. The cubic root of 122810857 is about 497.0639354638.

The spelling of 122810857 in words is "one hundred twenty-two million, eight hundred ten thousand, eight hundred fifty-seven".