1280928547 has 2 divisors, whose sum is σ = 1280928548. Its totient is φ = 1280928546.

The previous prime is 1280928479. The next prime is 1280928557. The reversal of 1280928547 is 7458290821.

It is a strong prime.

It is an emirp because it is prime and its reverse (7458290821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1280928547 - 2¹¹ = 1280926499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1280928497 and 1280928506.

It is not a weakly prime, because it can be changed into another prime (1280928557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640464273 + 640464274.

It is an arithmetic number, because the mean of its divisors is an integer number (640464274).

Almost surely, 2^1280928547 is an apocalyptic number.

1280928547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280928547 is an equidigital number, since it uses as much as digits as its factorization.

1280928547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1280928547 is about 35790.0621262383. The cubic root of 1280928547 is about 1086.0295315451.

The spelling of 1280928547 in words is "one billion, two hundred eighty million, nine hundred twenty-eight thousand, five hundred forty-seven".