13249649 has 12 divisors (see below), whose sum is σ = 15479604. Its totient is φ = 11307744.

The previous prime is 13249609. The next prime is 13249657. The reversal of 13249649 is 94694231.

It can be written as a sum of positive squares in 2 ways, for example, as 753424 + 12496225 = 868^2 + 3535^2 .

It is not a de Polignac number, because 13249649 - 2⁸ = 13249393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13249609) 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 11 ways as a sum of consecutive naturals, for example, 15107 + ... + 15959.

It is an arithmetic number, because the mean of its divisors is an integer number (1289967).

Almost surely, 2^13249649 is an apocalyptic number.

It is an amenable number.

13249649 is a deficient number, since it is larger than the sum of its proper divisors (2229955).

13249649 is an equidigital number, since it uses as much as digits as its factorization.

13249649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184 (or 1177 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 13249649 is about 3640.0067307630. The cubic root of 13249649 is about 236.6290850418.

It can be divided in two parts, 132496 and 49, that multiplied together give a square (6492304 = 2548²).

The spelling of 13249649 in words is "thirteen million, two hundred forty-nine thousand, six hundred forty-nine".