122404657 has 2 divisors, whose sum is σ = 122404658. Its totient is φ = 122404656.

The previous prime is 122404619. The next prime is 122404661. The reversal of 122404657 is 756404221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71081761 + 51322896 = 8431^2 + 7164^2 .

It is an emirp because it is prime and its reverse (756404221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122404657 - 2¹⁵ = 122371889 is a prime.

It is not a weakly prime, because it can be changed into another prime (122404757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61202328 + 61202329.

It is an arithmetic number, because the mean of its divisors is an integer number (61202329).

Almost surely, 2^122404657 is an apocalyptic number.

It is an amenable number.

122404657 is a deficient number, since it is larger than the sum of its proper divisors (1).

122404657 is an equidigital number, since it uses as much as digits as its factorization.

122404657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 122404657 is about 11063.6638144875. The cubic root of 122404657 is about 496.5153129993.

Adding to 122404657 its reverse (756404221), we get a palindrome (878808878).

The spelling of 122404657 in words is "one hundred twenty-two million, four hundred four thousand, six hundred fifty-seven".