122170657 has 4 divisors (see below), whose sum is σ = 139623616. Its totient is φ = 104717700.

The previous prime is 122170639. The next prime is 122170661. The reversal of 122170657 is 756071221.

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: 756071221 = 26513 ⋅28517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122170657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122170637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8726469 + ... + 8726482.

It is an arithmetic number, because the mean of its divisors is an integer number (34905904).

Almost surely, 2^122170657 is an apocalyptic number.

It is an amenable number.

122170657 is a deficient number, since it is larger than the sum of its proper divisors (17452959).

122170657 is an equidigital number, since it uses as much as digits as its factorization.

122170657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17452958.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 122170657 is about 11053.0835968973. The cubic root of 122170657 is about 496.1987163893.

The spelling of 122170657 in words is "one hundred twenty-two million, one hundred seventy thousand, six hundred fifty-seven".