13449521 has 2 divisors, whose sum is σ = 13449522. Its totient is φ = 13449520.

The previous prime is 13449509. The next prime is 13449529. The reversal of 13449521 is 12594431.

13449521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10491121 + 2958400 = 3239^2 + 1720^2 .

It is an emirp because it is prime and its reverse (12594431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13449521 - 2¹⁰ = 13448497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13449529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6724760 + 6724761.

It is an arithmetic number, because the mean of its divisors is an integer number (6724761).

Almost surely, 2^13449521 is an apocalyptic number.

It is an amenable number.

13449521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13449521 is an equidigital number, since it uses as much as digits as its factorization.

13449521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 13449521 is about 3667.3588589065. The cubic root of 13449521 is about 237.8130077958.

The spelling of 13449521 in words is "thirteen million, four hundred forty-nine thousand, five hundred twenty-one".