13529421 has 6 divisors (see below), whose sum is σ = 19542510. Its totient is φ = 9019608.

The previous prime is 13529419. The next prime is 13529429. The reversal of 13529421 is 12492531.

13529421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7209225 + 6320196 = 2685^2 + 2514^2 .

It is not a de Polignac number, because 13529421 - 2¹ = 13529419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13529429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 751626 + ... + 751643.

It is an arithmetic number, because the mean of its divisors is an integer number (3257085).

Almost surely, 2^13529421 is an apocalyptic number.

It is an amenable number.

13529421 is a deficient number, since it is larger than the sum of its proper divisors (6013089).

13529421 is a wasteful number, since it uses less digits than its factorization.

13529421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503275 (or 1503272 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 13529421 is about 3678.2361261887. The cubic root of 13529421 is about 238.2830060926.

The spelling of 13529421 in words is "thirteen million, five hundred twenty-nine thousand, four hundred twenty-one".