1290242617 has 2 divisors, whose sum is σ = 1290242618. Its totient is φ = 1290242616.

The previous prime is 1290242587. The next prime is 1290242641. The reversal of 1290242617 is 7162420921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1244396176 + 45846441 = 35276^2 + 6771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1290242617 is a prime.

It is a super-3 number, since 3×1290242617³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1290242677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645121308 + 645121309.

It is an arithmetic number, because the mean of its divisors is an integer number (645121309).

Almost surely, 2^1290242617 is an apocalyptic number.

It is an amenable number.

1290242617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290242617 is an equidigital number, since it uses as much as digits as its factorization.

1290242617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1290242617 is about 35919.9473412754. The cubic root of 1290242617 is about 1088.6554745933.

The spelling of 1290242617 in words is "one billion, two hundred ninety million, two hundred forty-two thousand, six hundred seventeen".