12817249 has 4 divisors (see below), whose sum is σ = 12828564. Its totient is φ = 12805936.

The previous prime is 12817213. The next prime is 12817307. The reversal of 12817249 is 94271821.

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 6350400 + 6466849 = 2520^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 12817249 - 2⁹ = 12816737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3742 + ... + 6295.

It is an arithmetic number, because the mean of its divisors is an integer number (3207141).

Almost surely, 2^12817249 is an apocalyptic number.

It is an amenable number.

12817249 is a deficient number, since it is larger than the sum of its proper divisors (11315).

12817249 is a wasteful number, since it uses less digits than its factorization.

12817249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314.

The product of its digits is 8064, while the sum is 34.

The square root of 12817249 is about 3580.1185734554. The cubic root of 12817249 is about 234.0264476888.

The spelling of 12817249 in words is "twelve million, eight hundred seventeen thousand, two hundred forty-nine".