13251649 has 2 divisors, whose sum is σ = 13251650. Its totient is φ = 13251648.

The previous prime is 13251647. The next prime is 13251659. The reversal of 13251649 is 94615231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12852225 + 399424 = 3585^2 + 632^2 .

It is a cyclic number.

It is not a de Polignac number, because 13251649 - 2¹ = 13251647 is a prime.

Together with 13251647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13251649.

It is not a weakly prime, because it can be changed into another prime (13251647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6625824 + 6625825.

It is an arithmetic number, because the mean of its divisors is an integer number (6625825).

Almost surely, 2^13251649 is an apocalyptic number.

It is an amenable number.

13251649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13251649 is an equidigital number, since it uses as much as digits as its factorization.

13251649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 13251649 is about 3640.2814451633. The cubic root of 13251649 is about 236.6409906241.

The spelling of 13251649 in words is "thirteen million, two hundred fifty-one thousand, six hundred forty-nine".