1280246417 has 2 divisors, whose sum is σ = 1280246418. Its totient is φ = 1280246416.

The previous prime is 1280246411. The next prime is 1280246419. The reversal of 1280246417 is 7146420821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1159334401 + 120912016 = 34049^2 + 10996^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280246417 - 2⁸ = 1280246161 is a prime.

Together with 1280246419, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1280246411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640123208 + 640123209.

It is an arithmetic number, because the mean of its divisors is an integer number (640123209).

Almost surely, 2^1280246417 is an apocalyptic number.

It is an amenable number.

1280246417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280246417 is an equidigital number, since it uses as much as digits as its factorization.

1280246417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 1280246417 is about 35780.5312565367. The cubic root of 1280246417 is about 1085.8367170263.

The spelling of 1280246417 in words is "one billion, two hundred eighty million, two hundred forty-six thousand, four hundred seventeen".