1292812256917 has 2 divisors, whose sum is σ = 1292812256918. Its totient is φ = 1292812256916.

The previous prime is 1292812256891. The next prime is 1292812256941. The reversal of 1292812256917 is 7196522182921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 724335464241 + 568476792676 = 851079^2 + 753974^2 .

It is a cyclic number.

It is not a de Polignac number, because 1292812256917 - 2²⁷ = 1292678039189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1292812256117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646406128458 + 646406128459.

It is an arithmetic number, because the mean of its divisors is an integer number (646406128459).

Almost surely, 2^{1292812256917} is an apocalyptic number.

It is an amenable number.

1292812256917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1292812256917 is an equidigital number, since it uses as much as digits as its factorization.

1292812256917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 55.

The spelling of 1292812256917 in words is "one trillion, two hundred ninety-two billion, eight hundred twelve million, two hundred fifty-six thousand, nine hundred seventeen".