1256366959 has 2 divisors, whose sum is σ = 1256366960. Its totient is φ = 1256366958.

The previous prime is 1256366953. The next prime is 1256367037. The reversal of 1256366959 is 9596636521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256366959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256366953) 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, 628183479 + 628183480.

It is an arithmetic number, because the mean of its divisors is an integer number (628183480).

Almost surely, 2^1256366959 is an apocalyptic number.

1256366959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256366959 is an equidigital number, since it uses as much as digits as its factorization.

1256366959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2624400, while the sum is 52.

The square root of 1256366959 is about 35445.2670888512. The cubic root of 1256366959 is about 1079.0432081092.

The spelling of 1256366959 in words is "one billion, two hundred fifty-six million, three hundred sixty-six thousand, nine hundred fifty-nine".