8201805 has 16 divisors (see below), whose sum is σ = 13320384. Its totient is φ = 4308480.

The previous prime is 8201801. The next prime is 8201807. The reversal of 8201805 is 5081028.

It is not a de Polignac number, because 8201805 - 2² = 8201801 is a prime.

8201805 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8201801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3076 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (832524).

Almost surely, 2^8201805 is an apocalyptic number.

It is an amenable number.

8201805 is a deficient number, since it is larger than the sum of its proper divisors (5118579).

8201805 is a wasteful number, since it uses less digits than its factorization.

8201805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8236.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 8201805 is about 2863.8793619844. The cubic root of 8201805 is about 201.6677625179.

The spelling of 8201805 in words is "eight million, two hundred one thousand, eight hundred five".