12966559 has 2 divisors, whose sum is σ = 12966560.
Its totient is φ = 12966558.
The previous prime is 12966557. The next prime is 12966589. The reversal of 12966559 is 95566921.
It is a weak prime.
It is an emirp because it is prime and its reverse (95566921) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12966559 - 21 = 12966557 is a prime.
Together with 12966557, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12966557) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6483279 + 6483280.
It is an arithmetic number, because the mean of its divisors is an integer number (6483280).
Almost surely, 212966559 is an apocalyptic number.
12966559 is a deficient number, since it is larger than the sum of its proper divisors (1).
12966559 is an equidigital number, since it uses as much as digits as its factorization.
12966559 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 145800, while the sum is 43.
The square root of 12966559 is about 3600.9108569916.
The cubic root of 12966559 is about 234.9316777391.
The spelling of 12966559 in words is "twelve million, nine hundred sixty-six thousand, five hundred fifty-nine".