13320641 has 4 divisors (see below), whose sum is σ = 13383984. Its totient is φ = 13257300.

The previous prime is 13320617. The next prime is 13320677. The reversal of 13320641 is 14602331.

13320641 is digitally balanced in base 3, 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 a de Polignac number, because none of the positive numbers 2^k-13320641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13323641) 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, 31355 + ... + 31776.

It is an arithmetic number, because the mean of its divisors is an integer number (3345996).

Almost surely, 2^13320641 is an apocalyptic number.

It is an amenable number.

13320641 is a deficient number, since it is larger than the sum of its proper divisors (63343).

13320641 is an equidigital number, since it uses as much as digits as its factorization.

13320641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63342.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 13320641 is about 3649.7453335815. The cubic root of 13320641 is about 237.0509542860.

Adding to 13320641 its reverse (14602331), we get a palindrome (27922972).

The spelling of 13320641 in words is "thirteen million, three hundred twenty thousand, six hundred forty-one".