122605657 has 4 divisors (see below), whose sum is σ = 125214336. Its totient is φ = 119996980.

The previous prime is 122605643. The next prime is 122605687. The reversal of 122605657 is 756506221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 756506221 = 13297 ⋅56893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122605657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122605687) 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, 1304269 + ... + 1304362.

It is an arithmetic number, because the mean of its divisors is an integer number (31303584).

Almost surely, 2^122605657 is an apocalyptic number.

It is an amenable number.

122605657 is a deficient number, since it is larger than the sum of its proper divisors (2608679).

122605657 is an equidigital number, since it uses as much as digits as its factorization.

122605657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608678.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 122605657 is about 11072.7438785515. The cubic root of 122605657 is about 496.7869393774.

The spelling of 122605657 in words is "one hundred twenty-two million, six hundred five thousand, six hundred fifty-seven".