1280508797 has 2 divisors, whose sum is σ = 1280508798. Its totient is φ = 1280508796.

The previous prime is 1280508793. The next prime is 1280508821. The reversal of 1280508797 is 7978050821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234187161 + 46321636 = 35131^2 + 6806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280508797 - 2² = 1280508793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280508791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640254398 + 640254399.

It is an arithmetic number, because the mean of its divisors is an integer number (640254399).

Almost surely, 2^1280508797 is an apocalyptic number.

It is an amenable number.

1280508797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280508797 is an equidigital number, since it uses as much as digits as its factorization.

1280508797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 1280508797 is about 35784.1975877621. The cubic root of 1280508797 is about 1085.9108908658.

The spelling of 1280508797 in words is "one billion, two hundred eighty million, five hundred eight thousand, seven hundred ninety-seven".