13328261 has 2 divisors, whose sum is σ = 13328262. Its totient is φ = 13328260.

The previous prime is 13328209. The next prime is 13328279. The reversal of 13328261 is 16282331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11519236 + 1809025 = 3394^2 + 1345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13328261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13328261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13328461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6664130 + 6664131.

It is an arithmetic number, because the mean of its divisors is an integer number (6664131).

Almost surely, 2^13328261 is an apocalyptic number.

It is an amenable number.

13328261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13328261 is an equidigital number, since it uses as much as digits as its factorization.

13328261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 13328261 is about 3650.7890927853. The cubic root of 13328261 is about 237.0961469047.

The spelling of 13328261 in words is "thirteen million, three hundred twenty-eight thousand, two hundred sixty-one".