1276881251 has 2 divisors, whose sum is σ = 1276881252. Its totient is φ = 1276881250.

The previous prime is 1276881233. The next prime is 1276881257. The reversal of 1276881251 is 1521886721.

It is a strong prime.

It is an emirp because it is prime and its reverse (1521886721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1276881251 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1276881199 and 1276881208.

It is not a weakly prime, because it can be changed into another prime (1276881257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638440625 + 638440626.

It is an arithmetic number, because the mean of its divisors is an integer number (638440626).

Almost surely, 2^1276881251 is an apocalyptic number.

1276881251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276881251 is an equidigital number, since it uses as much as digits as its factorization.

1276881251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 41.

The square root of 1276881251 is about 35733.4752158253. The cubic root of 1276881251 is about 1084.8844974629.

The spelling of 1276881251 in words is "one billion, two hundred seventy-six million, eight hundred eighty-one thousand, two hundred fifty-one".