1287868 has 12 divisors (see below), whose sum is σ = 2262232. Its totient is φ = 641520.

The previous prime is 1287857. The next prime is 1287883. The reversal of 1287868 is 8687821.

1287868 is nontrivially palindromic in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 1287868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183 + ... + 1993.

2^1287868 is an apocalyptic number.

It is an amenable number.

1287868 is a deficient number, since it is larger than the sum of its proper divisors (974364).

1287868 is a wasteful number, since it uses less digits than its factorization.

1287868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1210 counting only the distinct ones).

The product of its digits is 43008, while the sum is 40.

The square root of 1287868 is about 1134.8427203802. The cubic root of 1287868 is about 108.7987195279.

The spelling of 1287868 in words is "one million, two hundred eighty-seven thousand, eight hundred sixty-eight".