1276250250169 has 2 divisors, whose sum is σ = 1276250250170. Its totient is φ = 1276250250168.

The previous prime is 1276250250167. The next prime is 1276250250269. The reversal of 1276250250169 is 9610520526721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 676728343225 + 599521906944 = 822635^2 + 774288^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276250250169 - 2¹ = 1276250250167 is a prime.

It is a super-2 number, since 2×1276250250169² (a number of 25 digits) contains 22 as substring.

Together with 1276250250167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1276250250167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638125125084 + 638125125085.

It is an arithmetic number, because the mean of its divisors is an integer number (638125125085).

Almost surely, 2^{1276250250169} is an apocalyptic number.

It is an amenable number.

1276250250169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276250250169 is an equidigital number, since it uses as much as digits as its factorization.

1276250250169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 1276250250169 in words is "one trillion, two hundred seventy-six billion, two hundred fifty million, two hundred fifty thousand, one hundred sixty-nine".