12913249 has 2 divisors, whose sum is σ = 12913250. Its totient is φ = 12913248.

The previous prime is 12913247. The next prime is 12913253. The reversal of 12913249 is 94231921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12909649 + 3600 = 3593^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 12913249 - 2¹ = 12913247 is a prime.

Together with 12913247, it forms a pair of twin primes.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 12913249.

It is not a weakly prime, because it can be changed into another prime (12913247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6456624 + 6456625.

It is an arithmetic number, because the mean of its divisors is an integer number (6456625).

Almost surely, 2^12913249 is an apocalyptic number.

It is an amenable number.

12913249 is a deficient number, since it is larger than the sum of its proper divisors (1).

12913249 is an equidigital number, since it uses as much as digits as its factorization.

12913249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 12913249 is about 3593.5009391956. The cubic root of 12913249 is about 234.6092737553.

The spelling of 12913249 in words is "twelve million, nine hundred thirteen thousand, two hundred forty-nine".