1256304113 has 2 divisors, whose sum is σ = 1256304114. Its totient is φ = 1256304112.

The previous prime is 1256304067. The next prime is 1256304139. The reversal of 1256304113 is 3114036521.

It is an a-pointer prime, because the next prime (1256304139) can be obtained adding 1256304113 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917302369 + 339001744 = 30287^2 + 18412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256304113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256304613) 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, 628152056 + 628152057.

It is an arithmetic number, because the mean of its divisors is an integer number (628152057).

Almost surely, 2^1256304113 is an apocalyptic number.

It is an amenable number.

1256304113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256304113 is an equidigital number, since it uses as much as digits as its factorization.

1256304113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1256304113 is about 35444.3805560204. The cubic root of 1256304113 is about 1079.0252158393.

The spelling of 1256304113 in words is "one billion, two hundred fifty-six million, three hundred four thousand, one hundred thirteen".