12521249 has 4 divisors (see below), whose sum is σ = 13484436. Its totient is φ = 11558064.

The previous prime is 12521239. The next prime is 12521291. The reversal of 12521249 is 94212521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1345600 + 11175649 = 1160^2 + 3343^2 .

It is a cyclic number.

It is not a de Polignac number, because 12521249 - 2⁴ = 12521233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12521219) 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, 481574 + ... + 481599.

It is an arithmetic number, because the mean of its divisors is an integer number (3371109).

Almost surely, 2^12521249 is an apocalyptic number.

It is an amenable number.

12521249 is a deficient number, since it is larger than the sum of its proper divisors (963187).

12521249 is an equidigital number, since it uses as much as digits as its factorization.

12521249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963186.

The product of its digits is 1440, while the sum is 26.

The square root of 12521249 is about 3538.5376923243. The cubic root of 12521249 is about 232.2108727295.

The spelling of 12521249 in words is "twelve million, five hundred twenty-one thousand, two hundred forty-nine".