13255661 has 2 divisors, whose sum is σ = 13255662. Its totient is φ = 13255660.

The previous prime is 13255651. The next prime is 13255663. The reversal of 13255661 is 16655231.

13255661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13213225 + 42436 = 3635^2 + 206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13255661 is a prime.

Together with 13255663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13255663) 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 as a sum of consecutive naturals, namely, 6627830 + 6627831.

It is an arithmetic number, because the mean of its divisors is an integer number (6627831).

Almost surely, 2^13255661 is an apocalyptic number.

It is an amenable number.

13255661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13255661 is an equidigital number, since it uses as much as digits as its factorization.

13255661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 13255661 is about 3640.8324597542. The cubic root of 13255661 is about 236.6648696110.

The spelling of 13255661 in words is "thirteen million, two hundred fifty-five thousand, six hundred sixty-one".