13521017 has 4 divisors (see below), whose sum is σ = 13559040. Its totient is φ = 13482996.

The previous prime is 13520999. The next prime is 13521023. The reversal of 13521017 is 71012531.

13521017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13521017 - 2⁶ = 13520953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13521017.

It is not an unprimeable number, because it can be changed into a prime (13521097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18473 + ... + 19190.

It is an arithmetic number, because the mean of its divisors is an integer number (3389760).

Almost surely, 2^13521017 is an apocalyptic number.

It is an amenable number.

13521017 is a deficient number, since it is larger than the sum of its proper divisors (38023).

13521017 is an equidigital number, since it uses as much as digits as its factorization.

13521017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38022.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 13521017 is about 3677.0935533380. The cubic root of 13521017 is about 238.2336582020.

Adding to 13521017 its reverse (71012531), we get a palindrome (84533548).

The spelling of 13521017 in words is "thirteen million, five hundred twenty-one thousand, seventeen".