1286868587 has 2 divisors, whose sum is σ = 1286868588. Its totient is φ = 1286868586.

The previous prime is 1286868577. The next prime is 1286868589. The reversal of 1286868587 is 7858686821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1286868587 - 2¹⁸ = 1286606443 is a prime.

Together with 1286868589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1286868589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643434293 + 643434294.

It is an arithmetic number, because the mean of its divisors is an integer number (643434294).

Almost surely, 2^1286868587 is an apocalyptic number.

1286868587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286868587 is an equidigital number, since it uses as much as digits as its factorization.

1286868587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10321920, while the sum is 59.

The square root of 1286868587 is about 35872.9506313601. The cubic root of 1286868587 is about 1087.7056887020.

The spelling of 1286868587 in words is "one billion, two hundred eighty-six million, eight hundred sixty-eight thousand, five hundred eighty-seven".