13964521 has 2 divisors, whose sum is σ = 13964522. Its totient is φ = 13964520.

The previous prime is 13964513. The next prime is 13964527. The reversal of 13964521 is 12546931.

13964521 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., 12524521 + 1440000 = 3539^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 13964521 - 2³ = 13964513 is a prime.

It is not a weakly prime, because it can be changed into another prime (13964527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6982260 + 6982261.

It is an arithmetic number, because the mean of its divisors is an integer number (6982261).

Almost surely, 2^13964521 is an apocalyptic number.

It is an amenable number.

13964521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13964521 is an equidigital number, since it uses as much as digits as its factorization.

13964521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 13964521 is about 3736.9132984323. The cubic root of 13964521 is about 240.8104602929.

The spelling of 13964521 in words is "thirteen million, nine hundred sixty-four thousand, five hundred twenty-one".