13521149 has 2 divisors, whose sum is σ = 13521150. Its totient is φ = 13521148.

The previous prime is 13521139. The next prime is 13521197. The reversal of 13521149 is 94112531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 6285049 = 2690^2 + 2507^2 .

It is a cyclic number.

It is not a de Polignac number, because 13521149 - 2⁸ = 13520893 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13521139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760574 + 6760575.

It is an arithmetic number, because the mean of its divisors is an integer number (6760575).

Almost surely, 2^13521149 is an apocalyptic number.

It is an amenable number.

13521149 is a deficient number, since it is larger than the sum of its proper divisors (1).

13521149 is an equidigital number, since it uses as much as digits as its factorization.

13521149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 13521149 is about 3677.1115022528. Note that the first 3 decimals coincide. The cubic root of 13521149 is about 238.2344334578.

The spelling of 13521149 in words is "thirteen million, five hundred twenty-one thousand, one hundred forty-nine".