122744257 has 2 divisors, whose sum is σ = 122744258. Its totient is φ = 122744256.

The previous prime is 122744239. The next prime is 122744287. The reversal of 122744257 is 752447221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122744241 + 16 = 11079^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 122744257 - 2²³ = 114355649 is a prime.

It is not a weakly prime, because it can be changed into another prime (122744287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61372128 + 61372129.

It is an arithmetic number, because the mean of its divisors is an integer number (61372129).

Almost surely, 2^122744257 is an apocalyptic number.

It is an amenable number.

122744257 is a deficient number, since it is larger than the sum of its proper divisors (1).

122744257 is an equidigital number, since it uses as much as digits as its factorization.

122744257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31360, while the sum is 34.

The square root of 122744257 is about 11079.0007220868. Note that the first 3 decimals coincide. The cubic root of 122744257 is about 496.9740670681.

The spelling of 122744257 in words is "one hundred twenty-two million, seven hundred forty-four thousand, two hundred fifty-seven".