12515157 has 6 divisors (see below), whose sum is σ = 18077462. Its totient is φ = 8343432.

The previous prime is 12515123. The next prime is 12515159. The reversal of 12515157 is 75151521.

It can be written as a sum of positive squares in only one way, i.e., 11229201 + 1285956 = 3351^2 + 1134^2 .

It is not a de Polignac number, because 12515157 - 2⁶ = 12515093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12515157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515159) 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 in 5 ways as a sum of consecutive naturals, for example, 695278 + ... + 695295.

Almost surely, 2^12515157 is an apocalyptic number.

It is an amenable number.

12515157 is a deficient number, since it is larger than the sum of its proper divisors (5562305).

12515157 is a wasteful number, since it uses less digits than its factorization.

12515157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390579 (or 1390576 counting only the distinct ones).

The product of its digits is 1750, while the sum is 27.

The square root of 12515157 is about 3537.6767800352. The cubic root of 12515157 is about 232.1732072080.

Adding to 12515157 its reverse (75151521), we get a palindrome (87666678).

The spelling of 12515157 in words is "twelve million, five hundred fifteen thousand, one hundred fifty-seven".