1286813 has 16 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 1076400.

The previous prime is 1286807. The next prime is 1286819. The reversal of 1286813 is 3186821.

It is an interprime number because it is at equal distance from previous prime (1286807) and next prime (1286819).

It is a cyclic number.

It is not a de Polignac number, because 1286813 - 2⁴ = 1286797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286819) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9758 + ... + 9888.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2^1286813 is an apocalyptic number.

It is an amenable number.

1286813 is a deficient number, since it is larger than the sum of its proper divisors (233827).

1286813 is a wasteful number, since it uses less digits than its factorization.

1286813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its digits is 2304, while the sum is 29.

The square root of 1286813 is about 1134.3778030268. The cubic root of 1286813 is about 108.7690027127.

The spelling of 1286813 in words is "one million, two hundred eighty-six thousand, eight hundred thirteen".