13286561 has 2 divisors, whose sum is σ = 13286562. Its totient is φ = 13286560.

The previous prime is 13286549. The next prime is 13286597. The reversal of 13286561 is 16568231.

It is a happy number.

13286561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13184161 + 102400 = 3631^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 13286561 - 2¹⁴ = 13270177 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (13286531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6643280 + 6643281.

It is an arithmetic number, because the mean of its divisors is an integer number (6643281).

Almost surely, 2^13286561 is an apocalyptic number.

It is an amenable number.

13286561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13286561 is an equidigital number, since it uses as much as digits as its factorization.

13286561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 13286561 is about 3645.0735246357. The cubic root of 13286561 is about 236.8486217821.

The spelling of 13286561 in words is "thirteen million, two hundred eighty-six thousand, five hundred sixty-one".