13249621 has 12 divisors (see below), whose sum is σ = 16645216. Its totient is φ = 10323720.

The previous prime is 13249609. The next prime is 13249657. The reversal of 13249621 is 12694231.

13249621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13249621 - 2²³ = 4861013 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13249621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13249321) 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, 6975 + ... + 8668.

Almost surely, 2^13249621 is an apocalyptic number.

13249621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13249621 is a deficient number, since it is larger than the sum of its proper divisors (3395595).

13249621 is a wasteful number, since it uses less digits than its factorization.

13249621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15672 (or 15661 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 13249621 is about 3640.0028846142. The cubic root of 13249621 is about 236.6289183551.

The spelling of 13249621 in words is "thirteen million, two hundred forty-nine thousand, six hundred twenty-one".