12959561 has 2 divisors, whose sum is σ = 12959562. Its totient is φ = 12959560.

The previous prime is 12959543. The next prime is 12959579. The reversal of 12959561 is 16595921.

12959561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12959543) and next prime (12959579).

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 6405961 = 2560^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 12959561 - 2⁶ = 12959497 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12959521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6479780 + 6479781.

It is an arithmetic number, because the mean of its divisors is an integer number (6479781).

Almost surely, 2^12959561 is an apocalyptic number.

It is an amenable number.

12959561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12959561 is an equidigital number, since it uses as much as digits as its factorization.

12959561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 38.

The square root of 12959561 is about 3599.9390272614. The cubic root of 12959561 is about 234.8894062382.

The spelling of 12959561 in words is "twelve million, nine hundred fifty-nine thousand, five hundred sixty-one".