1285868 has 6 divisors (see below), whose sum is σ = 2250276. Its totient is φ = 642932.

The previous prime is 1285859. The next prime is 1285871. The reversal of 1285868 is 8685821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160730 + ... + 160737.

It is an arithmetic number, because the mean of its divisors is an integer number (375046).

2^1285868 is an apocalyptic number.

It is an amenable number.

1285868 is a deficient number, since it is larger than the sum of its proper divisors (964408).

1285868 is a wasteful number, since it uses less digits than its factorization.

1285868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321471 (or 321469 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 1285868 is about 1133.9611986307. The cubic root of 1285868 is about 108.7423705398.

The spelling of 1285868 in words is "one million, two hundred eighty-five thousand, eight hundred sixty-eight".