15121157 has 2 divisors, whose sum is σ = 15121158. Its totient is φ = 15121156.

The previous prime is 15121111. The next prime is 15121181. The reversal of 15121157 is 75112151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10588516 + 4532641 = 3254^2 + 2129^2 .

It is a cyclic number.

It is not a de Polignac number, because 15121157 - 2¹² = 15117061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15121187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560578 + 7560579.

It is an arithmetic number, because the mean of its divisors is an integer number (7560579).

Almost surely, 2^15121157 is an apocalyptic number.

It is an amenable number.

15121157 is a deficient number, since it is larger than the sum of its proper divisors (1).

15121157 is an equidigital number, since it uses as much as digits as its factorization.

15121157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 350, while the sum is 23.

The square root of 15121157 is about 3888.5931903453. The cubic root of 15121157 is about 247.2834251386.

The spelling of 15121157 in words is "fifteen million, one hundred twenty-one thousand, one hundred fifty-seven".