13149621 has 20 divisors (see below), whose sum is σ = 19944672. Its totient is φ = 8632008.

The previous prime is 13149601. The next prime is 13149623. The reversal of 13149621 is 12694131.

13149621 is a `hidden beast` number, since 1 + 31 + 4 + 9 + 621 = 666.

13149621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13149621 - 2⁵ = 13149589 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13149623) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4216 + ... + 6638.

Almost surely, 2^13149621 is an apocalyptic number.

It is an amenable number.

13149621 is a deficient number, since it is larger than the sum of its proper divisors (6795051).

13149621 is an equidigital number, since it uses as much as digits as its factorization.

13149621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502 (or 2493 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 13149621 is about 3626.2406152929. The cubic root of 13149621 is about 236.0321044613.

The spelling of 13149621 in words is "thirteen million, one hundred forty-nine thousand, six hundred twenty-one".