1287458668 has 24 divisors (see below), whose sum is σ = 2276990352. Its totient is φ = 636905664.

The previous prime is 1287458659. The next prime is 1287458681. The reversal of 1287458668 is 8668547821.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 476730 + ... + 479422.

It is an arithmetic number, because the mean of its divisors is an integer number (94874598).

Almost surely, 2^1287458668 is an apocalyptic number.

It is an amenable number.

1287458668 is a deficient number, since it is larger than the sum of its proper divisors (989531684).

1287458668 is a wasteful number, since it uses less digits than its factorization.

1287458668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3921 (or 3919 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 55.

The square root of 1287458668 is about 35881.1742840170. The cubic root of 1287458668 is about 1087.8719155646.

The spelling of 1287458668 in words is "one billion, two hundred eighty-seven million, four hundred fifty-eight thousand, six hundred sixty-eight".