8104021 has 8 divisors (see below), whose sum is σ = 8461080. Its totient is φ = 7752192.

The previous prime is 8104007. The next prime is 8104039. The reversal of 8104021 is 1204018.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 342225 + 7761796 = 585^2 + 2786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8104021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8103986 and 8104004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8101021) 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 7 ways as a sum of consecutive naturals, for example, 2041 + ... + 4513.

It is an arithmetic number, because the mean of its divisors is an integer number (1057635).

Almost surely, 2^8104021 is an apocalyptic number.

It is an amenable number.

8104021 is a deficient number, since it is larger than the sum of its proper divisors (357059).

8104021 is a wasteful number, since it uses less digits than its factorization.

8104021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 8104021 is about 2846.7562241962. The cubic root of 8104021 is about 200.8631115011.

Adding to 8104021 its reverse (1204018), we get a palindrome (9308039).

The spelling of 8104021 in words is "eight million, one hundred four thousand, twenty-one".