1001806 has 16 divisors (see below), whose sum is σ = 1651104. Its totient is φ = 453024.

The previous prime is 1001801. The next prime is 1001807. The reversal of 1001806 is 6081001.

1001806 = T₂₆ + T₂₇ + ... + T₁₈₁.

It is a self number, because there is not a number n which added to its sum of digits gives 1001806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001801) 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 7 ways as a sum of consecutive naturals, for example, 1015 + ... + 1741.

It is an arithmetic number, because the mean of its divisors is an integer number (103194).

2^1001806 is an apocalyptic number.

1001806 is a deficient number, since it is larger than the sum of its proper divisors (649298).

1001806 is a wasteful number, since it uses less digits than its factorization.

1001806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1001806 is about 1000.9025926632. The cubic root of 1001806 is about 100.0601637959.

Adding to 1001806 its reverse (6081001), we get a palindrome (7082807).

The spelling of 1001806 in words is "one million, one thousand, eight hundred six".