1256461159 has 2 divisors, whose sum is σ = 1256461160. Its totient is φ = 1256461158.

The previous prime is 1256461123. The next prime is 1256461169. The reversal of 1256461159 is 9511646521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256461159 - 2¹⁵ = 1256428391 is a prime.

It is a super-3 number, since 3×1256461159³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256461169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628230579 + 628230580.

It is an arithmetic number, because the mean of its divisors is an integer number (628230580).

Almost surely, 2^1256461159 is an apocalyptic number.

1256461159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256461159 is an equidigital number, since it uses as much as digits as its factorization.

1256461159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 1256461159 is about 35446.5958732288. The cubic root of 1256461159 is about 1079.0701756362.

The spelling of 1256461159 in words is "one billion, two hundred fifty-six million, four hundred sixty-one thousand, one hundred fifty-nine".