13043321 has 4 divisors (see below), whose sum is σ = 13070592. Its totient is φ = 13016052.

The previous prime is 13043309. The next prime is 13043333. The reversal of 13043321 is 12334031.

It is a happy number.

13043321 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 an interprime number because it is at equal distance from previous prime (13043309) and next prime (13043333).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13043321 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 13043321.

It is not an unprimeable number, because it can be changed into a prime (13043341) 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, 12905 + ... + 13878.

It is an arithmetic number, because the mean of its divisors is an integer number (3267648).

Almost surely, 2^13043321 is an apocalyptic number.

It is an amenable number.

13043321 is a deficient number, since it is larger than the sum of its proper divisors (27271).

13043321 is an equidigital number, since it uses as much as digits as its factorization.

13043321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27270.

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

The square root of 13043321 is about 3611.5538207259. The cubic root of 13043321 is about 235.3943642363.

Adding to 13043321 its reverse (12334031), we get a palindrome (25377352).

The spelling of 13043321 in words is "thirteen million, forty-three thousand, three hundred twenty-one".