12515251 has 4 divisors (see below), whose sum is σ = 14303152. Its totient is φ = 10727352.

The previous prime is 12515203. The next prime is 12515311. The reversal of 12515251 is 15251521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12515251 - 2⁷ = 12515123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12515201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893940 + ... + 893953.

It is an arithmetic number, because the mean of its divisors is an integer number (3575788).

Almost surely, 2^12515251 is an apocalyptic number.

12515251 is a deficient number, since it is larger than the sum of its proper divisors (1787901).

12515251 is an equidigital number, since it uses as much as digits as its factorization.

12515251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787900.

The product of its digits is 500, while the sum is 22.

The square root of 12515251 is about 3537.6900655654. The cubic root of 12515251 is about 232.1737884826.

Adding to 12515251 its reverse (15251521), we get a palindrome (27766772).

It can be divided in two parts, 125 and 15251, that added together give a square (15376 = 124²).

The spelling of 12515251 in words is "twelve million, five hundred fifteen thousand, two hundred fifty-one".