12499915 has 4 divisors (see below), whose sum is σ = 14999904. Its totient is φ = 9999928.

The previous prime is 12499909. The next prime is 12499919. The reversal of 12499915 is 51999421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51999421 = 2273 ⋅22877.

It is a cyclic number.

It is not a de Polignac number, because 12499915 - 2¹³ = 12491723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12499919) 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 3 ways as a sum of consecutive naturals, for example, 1249987 + ... + 1249996.

It is an arithmetic number, because the mean of its divisors is an integer number (3749976).

Almost surely, 2^12499915 is an apocalyptic number.

12499915 is a deficient number, since it is larger than the sum of its proper divisors (2499989).

12499915 is an equidigital number, since it uses as much as digits as its factorization.

12499915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499988.

The product of its digits is 29160, while the sum is 40.

The square root of 12499915 is about 3535.5218850970. The cubic root of 12499915 is about 232.0789156327.

The spelling of 12499915 in words is "twelve million, four hundred ninety-nine thousand, nine hundred fifteen".