13122157 has 2 divisors, whose sum is σ = 13122158. Its totient is φ = 13122156.

The previous prime is 13122133. The next prime is 13122169. The reversal of 13122157 is 75122131.

It is a happy number.

13122157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10949481 + 2172676 = 3309^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 13122157 - 2²³ = 4733549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13122127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561078 + 6561079.

It is an arithmetic number, because the mean of its divisors is an integer number (6561079).

Almost surely, 2^13122157 is an apocalyptic number.

It is an amenable number.

13122157 is a deficient number, since it is larger than the sum of its proper divisors (1).

13122157 is an equidigital number, since it uses as much as digits as its factorization.

13122157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 22.

The square root of 13122157 is about 3622.4517940202. The cubic root of 13122157 is about 235.8676661618.

Adding to 13122157 its reverse (75122131), we get a palindrome (88244288).

The spelling of 13122157 in words is "thirteen million, one hundred twenty-two thousand, one hundred fifty-seven".