1286766 has 60 divisors (see below), whose sum is σ = 3188592. Its totient is φ = 387504.

The previous prime is 1286711. The next prime is 1286773. The reversal of 1286766 is 6676821.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1286766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 27355 + ... + 27401.

2^1286766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1594296).

1286766 is an abundant number, since it is smaller than the sum of its proper divisors (1901826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1286766 is a wasteful number, since it uses less digits than its factorization.

1286766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 65 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1286766 is about 1134.3570866354. The cubic root of 1286766 is about 108.7676784578.

The spelling of 1286766 in words is "one million, two hundred eighty-six thousand, seven hundred sixty-six".