1256876983 has 2 divisors, whose sum is σ = 1256876984. Its totient is φ = 1256876982.

The previous prime is 1256876977. The next prime is 1256877019. The reversal of 1256876983 is 3896786521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1256876983 - 2⁹ = 1256876471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256876953) 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, 628438491 + 628438492.

It is an arithmetic number, because the mean of its divisors is an integer number (628438492).

Almost surely, 2^1256876983 is an apocalyptic number.

1256876983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256876983 is an equidigital number, since it uses as much as digits as its factorization.

1256876983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The square root of 1256876983 is about 35452.4608877861. The cubic root of 1256876983 is about 1079.1892014104.

The spelling of 1256876983 in words is "one billion, two hundred fifty-six million, eight hundred seventy-six thousand, nine hundred eighty-three".