1276256677 has 2 divisors, whose sum is σ = 1276256678. Its totient is φ = 1276256676.

The previous prime is 1276256633. The next prime is 1276256687. The reversal of 1276256677 is 7766526721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227731521 + 48525156 = 35039^2 + 6966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276256677 - 2⁷ = 1276256549 is a prime.

It is a super-2 number, since 2×1276256677² = 3257662211174164658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1276256677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276256687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638128338 + 638128339.

It is an arithmetic number, because the mean of its divisors is an integer number (638128339).

Almost surely, 2^1276256677 is an apocalyptic number.

It is an amenable number.

1276256677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276256677 is an equidigital number, since it uses as much as digits as its factorization.

1276256677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 49.

The square root of 1276256677 is about 35724.7348065734. The cubic root of 1276256677 is about 1084.7075817268.

The spelling of 1276256677 in words is "one billion, two hundred seventy-six million, two hundred fifty-six thousand, six hundred seventy-seven".