13226645 has 4 divisors (see below), whose sum is σ = 15871980. Its totient is φ = 10581312.

The previous prime is 13226623. The next prime is 13226683. The reversal of 13226645 is 54662231.

13226645 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.

It can be written as a sum of positive squares in 2 ways, for example, as 6220036 + 7006609 = 2494^2 + 2647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13226645 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322660 + ... + 1322669.

It is an arithmetic number, because the mean of its divisors is an integer number (3967995).

Almost surely, 2^13226645 is an apocalyptic number.

It is an amenable number.

13226645 is a deficient number, since it is larger than the sum of its proper divisors (2645335).

13226645 is an equidigital number, since it uses as much as digits as its factorization.

13226645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645334.

The product of its digits is 8640, while the sum is 29.

The square root of 13226645 is about 3636.8454737588. The cubic root of 13226645 is about 236.4920608133.

Adding to 13226645 its reverse (54662231), we get a palindrome (67888876).

The spelling of 13226645 in words is "thirteen million, two hundred twenty-six thousand, six hundred forty-five".