122157517 has 4 divisors (see below), whose sum is σ = 128586880. Its totient is φ = 115728156.

The previous prime is 122157493. The next prime is 122157521. The reversal of 122157517 is 715751221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122157517 - 2⁷ = 122157389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122157547) 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, 3214653 + ... + 3214690.

It is an arithmetic number, because the mean of its divisors is an integer number (32146720).

Almost surely, 2^122157517 is an apocalyptic number.

It is an amenable number.

122157517 is a deficient number, since it is larger than the sum of its proper divisors (6429363).

122157517 is an equidigital number, since it uses as much as digits as its factorization.

122157517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429362.

The product of its digits is 4900, while the sum is 31.

The square root of 122157517 is about 11052.4891766516. The cubic root of 122157517 is about 496.1809262885.

The spelling of 122157517 in words is "one hundred twenty-two million, one hundred fifty-seven thousand, five hundred seventeen".