13356641 has 4 divisors (see below), whose sum is σ = 13364400. Its totient is φ = 13348884.

The previous prime is 13356619. The next prime is 13356643. The reversal of 13356641 is 14665331.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13356641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13356643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11 + ... + 5168.

It is an arithmetic number, because the mean of its divisors is an integer number (3341100).

Almost surely, 2^13356641 is an apocalyptic number.

It is an amenable number.

13356641 is a deficient number, since it is larger than the sum of its proper divisors (7759).

13356641 is an equidigital number, since it uses as much as digits as its factorization.

13356641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7758.

The product of its digits is 6480, while the sum is 29.

The square root of 13356641 is about 3654.6738568578. The cubic root of 13356641 is about 237.2643113386.

The spelling of 13356641 in words is "thirteen million, three hundred fifty-six thousand, six hundred forty-one".