13226561 has 8 divisors (see below), whose sum is σ = 14243040. Its totient is φ = 12236608.

The previous prime is 13226531. The next prime is 13226579. The reversal of 13226561 is 16562231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13226561 - 2⁶ = 13226497 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 13226561.

It is not an unprimeable number, because it can be changed into a prime (13226531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5591 + ... + 7596.

It is an arithmetic number, because the mean of its divisors is an integer number (1780380).

Almost surely, 2^13226561 is an apocalyptic number.

It is an amenable number.

13226561 is a deficient number, since it is larger than the sum of its proper divisors (1016479).

13226561 is a wasteful number, since it uses less digits than its factorization.

13226561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13263.

The product of its digits is 2160, while the sum is 26.

The square root of 13226561 is about 3636.8339252707. The cubic root of 13226561 is about 236.4915601730.

Adding to 13226561 its reverse (16562231), we get a palindrome (29788792).

The spelling of 13226561 in words is "thirteen million, two hundred twenty-six thousand, five hundred sixty-one".