1288806 has 16 divisors (see below), whose sum is σ = 2611200. Its totient is φ = 424008.

The previous prime is 1288799. The next prime is 1288817. The reversal of 1288806 is 6088821.

It is a super-2 number, since 2×1288806² = 3322041811272, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 886 + ... + 1833.

It is an arithmetic number, because the mean of its divisors is an integer number (163200).

2^1288806 is an apocalyptic number.

1288806 is an abundant number, since it is smaller than the sum of its proper divisors (1322394).

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

1288806 is a wasteful number, since it uses less digits than its factorization.

1288806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 1288806 is about 1135.2559182845. The cubic root of 1288806 is about 108.8251271081.

The spelling of 1288806 in words is "one million, two hundred eighty-eight thousand, eight hundred six".