13340321 has 4 divisors (see below), whose sum is σ = 13361712. Its totient is φ = 13318932.

The previous prime is 13340309. The next prime is 13340351. The reversal of 13340321 is 12304331.

It is a happy number.

13340321 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, and also an emirpimes, since its reverse is a distinct semiprime: 12304331 = 13 ⋅946487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13340321 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 13340321.

It is not an unprimeable number, because it can be changed into a prime (13340351) 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, 9731 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (3340428).

Almost surely, 2^13340321 is an apocalyptic number.

It is an amenable number.

13340321 is a deficient number, since it is larger than the sum of its proper divisors (21391).

13340321 is an equidigital number, since it uses as much as digits as its factorization.

13340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21390.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 13340321 is about 3652.4404170363. The cubic root of 13340321 is about 237.1676370397.

Adding to 13340321 its reverse (12304331), we get a palindrome (25644652).

The spelling of 13340321 in words is "thirteen million, three hundred forty thousand, three hundred twenty-one".