1280824087 has 2 divisors, whose sum is σ = 1280824088. Its totient is φ = 1280824086.

The previous prime is 1280824049. The next prime is 1280824147. The reversal of 1280824087 is 7804280821.

It is a weak prime.

It is an emirp because it is prime and its reverse (7804280821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280824087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280824037) 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, 640412043 + 640412044.

It is an arithmetic number, because the mean of its divisors is an integer number (640412044).

Almost surely, 2^1280824087 is an apocalyptic number.

1280824087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280824087 is an equidigital number, since it uses as much as digits as its factorization.

1280824087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 1280824087 is about 35788.6027528318. The cubic root of 1280824087 is about 1086.0000087615. Note that the first 5 decimals are identical.

The spelling of 1280824087 in words is "one billion, two hundred eighty million, eight hundred twenty-four thousand, eighty-seven".