8201005 has 4 divisors (see below), whose sum is σ = 9841212. Its totient is φ = 6560800.

The previous prime is 8200991. The next prime is 8201009. The reversal of 8201005 is 5001028.

It is a happy number.

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 1077444 + 7123561 = 1038^2 + 2669^2 .

It is not a de Polignac number, because 8201005 - 2⁷ = 8200877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8201009) 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, 820096 + ... + 820105.

It is an arithmetic number, because the mean of its divisors is an integer number (2460303).

Almost surely, 2^8201005 is an apocalyptic number.

It is an amenable number.

8201005 is a deficient number, since it is larger than the sum of its proper divisors (1640207).

8201005 is a wasteful number, since it uses less digits than its factorization.

8201005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640206.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 8201005 is about 2863.7396878906. The cubic root of 8201005 is about 201.6612054467.

The spelling of 8201005 in words is "eight million, two hundred one thousand, five".