122015917 has 2 divisors, whose sum is σ = 122015918. Its totient is φ = 122015916.

The previous prime is 122015909. The next prime is 122015939. The reversal of 122015917 is 719510221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117809316 + 4206601 = 10854^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 122015917 - 2³ = 122015909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122015947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61007958 + 61007959.

It is an arithmetic number, because the mean of its divisors is an integer number (61007959).

Almost surely, 2^122015917 is an apocalyptic number.

It is an amenable number.

122015917 is a deficient number, since it is larger than the sum of its proper divisors (1).

122015917 is an equidigital number, since it uses as much as digits as its factorization.

122015917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 122015917 is about 11046.0815224223. The cubic root of 122015917 is about 495.9891346150.

The spelling of 122015917 in words is "one hundred twenty-two million, fifteen thousand, nine hundred seventeen".