13226861 has 2 divisors, whose sum is σ = 13226862. Its totient is φ = 13226860.

The previous prime is 13226827. The next prime is 13226897. The reversal of 13226861 is 16862231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9302500 + 3924361 = 3050^2 + 1981^2 .

It is an emirp because it is prime and its reverse (16862231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13226861 - 2¹⁸ = 12964717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13226821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6613430 + 6613431.

It is an arithmetic number, because the mean of its divisors is an integer number (6613431).

Almost surely, 2^13226861 is an apocalyptic number.

It is an amenable number.

13226861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13226861 is an equidigital number, since it uses as much as digits as its factorization.

13226861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 13226861 is about 3636.8751697027. The cubic root of 13226861 is about 236.4933481644.

The spelling of 13226861 in words is "thirteen million, two hundred twenty-six thousand, eight hundred sixty-one".