12427982257 has 2 divisors, whose sum is σ = 12427982258. Its totient is φ = 12427982256.

The previous prime is 12427982221. The next prime is 12427982297. The reversal of 12427982257 is 75228972421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12426898576 + 1083681 = 111476^2 + 1041^2 .

It is an emirp because it is prime and its reverse (75228972421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12427982257 - 2²⁷ = 12293764529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12427982257.

It is not a weakly prime, because it can be changed into another prime (12427982297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6213991128 + 6213991129.

It is an arithmetic number, because the mean of its divisors is an integer number (6213991129).

Almost surely, 2^12427982257 is an apocalyptic number.

It is an amenable number.

12427982257 is a deficient number, since it is larger than the sum of its proper divisors (1).

12427982257 is an equidigital number, since it uses as much as digits as its factorization.

12427982257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 49.

The spelling of 12427982257 in words is "twelve billion, four hundred twenty-seven million, nine hundred eighty-two thousand, two hundred fifty-seven".