1280712082261 has 2 divisors, whose sum is σ = 1280712082262. Its totient is φ = 1280712082260.

The previous prime is 1280712082217. The next prime is 1280712082277. The reversal of 1280712082261 is 1622802170821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1271862917361 + 8849164900 = 1127769^2 + 94070^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280712082261 - 2¹¹ = 1280712080213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280712082561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640356041130 + 640356041131.

It is an arithmetic number, because the mean of its divisors is an integer number (640356041131).

Almost surely, 2^{1280712082261} is an apocalyptic number.

It is an amenable number.

1280712082261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280712082261 is an equidigital number, since it uses as much as digits as its factorization.

1280712082261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 1280712082261 in words is "one trillion, two hundred eighty billion, seven hundred twelve million, eighty-two thousand, two hundred sixty-one".