8104205 has 4 divisors (see below), whose sum is σ = 9725052. Its totient is φ = 6483360.

The previous prime is 8104199. The next prime is 8104207. The reversal of 8104205 is 5024018.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2735716 + 5368489 = 1654^2 + 2317^2 .

It is not a de Polignac number, because 8104205 - 2⁶ = 8104141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8104207) 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 3 ways as a sum of consecutive naturals, for example, 810416 + ... + 810425.

It is an arithmetic number, because the mean of its divisors is an integer number (2431263).

Almost surely, 2^8104205 is an apocalyptic number.

It is an amenable number.

8104205 is a deficient number, since it is larger than the sum of its proper divisors (1620847).

8104205 is a wasteful number, since it uses less digits than its factorization.

8104205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620846.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 8104205 is about 2846.7885414972. The cubic root of 8104205 is about 200.8646316738.

The spelling of 8104205 in words is "eight million, one hundred four thousand, two hundred five".