12521253 has 4 divisors (see below), whose sum is σ = 16695008. Its totient is φ = 8347500.

The previous prime is 12521239. The next prime is 12521291. The reversal of 12521253 is 35212521.

12521253 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12521253 - 2⁶ = 12521189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521203) 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, 2086873 + ... + 2086878.

It is an arithmetic number, because the mean of its divisors is an integer number (4173752).

Almost surely, 2^12521253 is an apocalyptic number.

It is an amenable number.

12521253 is a deficient number, since it is larger than the sum of its proper divisors (4173755).

12521253 is an equidigital number, since it uses as much as digits as its factorization.

12521253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173754.

The product of its digits is 600, while the sum is 21.

The square root of 12521253 is about 3538.5382575295. The cubic root of 12521253 is about 232.2108974566.

Adding to 12521253 its reverse (35212521), we get a palindrome (47733774).

The spelling of 12521253 in words is "twelve million, five hundred twenty-one thousand, two hundred fifty-three".