1285799512787 has 2 divisors, whose sum is σ = 1285799512788. Its totient is φ = 1285799512786.

The previous prime is 1285799512783. The next prime is 1285799512817. The reversal of 1285799512787 is 7872159975821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285799512787 - 2² = 1285799512783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1285799512787.

It is not a weakly prime, because it can be changed into another prime (1285799512783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642899756393 + 642899756394.

It is an arithmetic number, because the mean of its divisors is an integer number (642899756394).

Almost surely, 2^{1285799512787} is an apocalyptic number.

1285799512787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285799512787 is an equidigital number, since it uses as much as digits as its factorization.

1285799512787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 177811200, while the sum is 71.

The spelling of 1285799512787 in words is "one trillion, two hundred eighty-five billion, seven hundred ninety-nine million, five hundred twelve thousand, seven hundred eighty-seven".