122657449 has 2 divisors, whose sum is σ = 122657450. Its totient is φ = 122657448.

The previous prime is 122657441. The next prime is 122657461. The reversal of 122657449 is 944756221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118657449 + 4000000 = 10893^2 + 2000^2 .

It is an emirp because it is prime and its reverse (944756221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122657449 - 2³ = 122657441 is a prime.

It is not a weakly prime, because it can be changed into another prime (122657441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61328724 + 61328725.

It is an arithmetic number, because the mean of its divisors is an integer number (61328725).

Almost surely, 2^122657449 is an apocalyptic number.

It is an amenable number.

122657449 is a deficient number, since it is larger than the sum of its proper divisors (1).

122657449 is an equidigital number, since it uses as much as digits as its factorization.

122657449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 122657449 is about 11075.0823473237. The cubic root of 122657449 is about 496.8568816831.

The spelling of 122657449 in words is "one hundred twenty-two million, six hundred fifty-seven thousand, four hundred forty-nine".