1280566271 has 2 divisors, whose sum is σ = 1280566272. Its totient is φ = 1280566270.

The previous prime is 1280566223. The next prime is 1280566279. The reversal of 1280566271 is 1726650821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1280566271 - 2⁶ = 1280566207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280566279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640283135 + 640283136.

It is an arithmetic number, because the mean of its divisors is an integer number (640283136).

Almost surely, 2^1280566271 is an apocalyptic number.

1280566271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280566271 is an equidigital number, since it uses as much as digits as its factorization.

1280566271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 1280566271 is about 35785.0006427274. Note that the first 3 decimals coincide. The cubic root of 1280566271 is about 1085.9271371967.

The spelling of 1280566271 in words is "one billion, two hundred eighty million, five hundred sixty-six thousand, two hundred seventy-one".