1256875131959 has 2 divisors, whose sum is σ = 1256875131960. Its totient is φ = 1256875131958.

The previous prime is 1256875131907. The next prime is 1256875131961. The reversal of 1256875131959 is 9591315786521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256875131959 - 2⁸ = 1256875131703 is a prime.

It is a Sophie Germain prime.

Together with 1256875131961, 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 (1256875139959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628437565979 + 628437565980.

It is an arithmetic number, because the mean of its divisors is an integer number (628437565980).

Almost surely, 2^{1256875131959} is an apocalyptic number.

1256875131959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256875131959 is an equidigital number, since it uses as much as digits as its factorization.

1256875131959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412000, while the sum is 62.

The spelling of 1256875131959 in words is "one trillion, two hundred fifty-six billion, eight hundred seventy-five million, one hundred thirty-one thousand, nine hundred fifty-nine".