1290266317 has 2 divisors, whose sum is σ = 1290266318. Its totient is φ = 1290266316.

The previous prime is 1290266297. The next prime is 1290266321. The reversal of 1290266317 is 7136620921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 917544681 + 372721636 = 30291^2 + 19306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290266317 - 2²⁷ = 1156048589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290266917) 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, 645133158 + 645133159.

It is an arithmetic number, because the mean of its divisors is an integer number (645133159).

Almost surely, 2^1290266317 is an apocalyptic number.

It is an amenable number.

1290266317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290266317 is an equidigital number, since it uses as much as digits as its factorization.

1290266317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1290266317 is about 35920.2772400214. The cubic root of 1290266317 is about 1088.6621402587.

The spelling of 1290266317 in words is "one billion, two hundred ninety million, two hundred sixty-six thousand, three hundred seventeen".