12515457 has 4 divisors (see below), whose sum is σ = 16687280. Its totient is φ = 8343636.

The previous prime is 12515453. The next prime is 12515467. The reversal of 12515457 is 75451521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12515457 - 2² = 12515453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12515453) 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 in 3 ways as a sum of consecutive naturals, for example, 2085907 + ... + 2085912.

It is an arithmetic number, because the mean of its divisors is an integer number (4171820).

Almost surely, 2^12515457 is an apocalyptic number.

It is an amenable number.

12515457 is a deficient number, since it is larger than the sum of its proper divisors (4171823).

12515457 is an equidigital number, since it uses as much as digits as its factorization.

12515457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171822.

The product of its digits is 7000, while the sum is 30.

The square root of 12515457 is about 3537.7191804890. The cubic root of 12515457 is about 232.1750623294.

Adding to 12515457 its reverse (75451521), we get a palindrome (87966978).

The spelling of 12515457 in words is "twelve million, five hundred fifteen thousand, four hundred fifty-seven".