1276250250269 has 2 divisors, whose sum is σ = 1276250250270. Its totient is φ = 1276250250268.

The previous prime is 1276250250169. The next prime is 1276250250271. The reversal of 1276250250269 is 9620520526721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1146676888900 + 129573361369 = 1070830^2 + 359963^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276250250269 - 2²⁸ = 1275981814813 is a prime.

It is a super-2 number, since 2×1276250250269² (a number of 25 digits) contains 22 as substring.

Together with 1276250250271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1276250250169) 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, 638125125134 + 638125125135.

It is an arithmetic number, because the mean of its divisors is an integer number (638125125135).

Almost surely, 2^{1276250250269} is an apocalyptic number.

It is an amenable number.

1276250250269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276250250269 is an equidigital number, since it uses as much as digits as its factorization.

1276250250269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 1276250250269 in words is "one trillion, two hundred seventy-six billion, two hundred fifty million, two hundred fifty thousand, two hundred sixty-nine".