12457515 has 48 divisors (see below), whose sum is σ = 24574752. Its totient is φ = 5354496.

The previous prime is 12457499. The next prime is 12457519. The reversal of 12457515 is 51575421.

It is not a de Polignac number, because 12457515 - 2⁴ = 12457499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12457519) 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 47 ways as a sum of consecutive naturals, for example, 11997 + ... + 12993.

It is an arithmetic number, because the mean of its divisors is an integer number (511974).

Almost surely, 2^12457515 is an apocalyptic number.

12457515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12457515 is a deficient number, since it is larger than the sum of its proper divisors (12117237).

12457515 is a wasteful number, since it uses less digits than its factorization.

12457515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1029 counting only the distinct ones).

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

The square root of 12457515 is about 3529.5205056778. The cubic root of 12457515 is about 231.8162126987.

The spelling of 12457515 in words is "twelve million, four hundred fifty-seven thousand, five hundred fifteen".