8004521 has 8 divisors (see below), whose sum is σ = 9166080. Its totient is φ = 6847488.

The previous prime is 8004511. The next prime is 8004547. The reversal of 8004521 is 1254008.

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

It is a cyclic number.

It is not a de Polignac number, because 8004521 - 2⁶ = 8004457 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8004493 and 8004502.

It is not an unprimeable number, because it can be changed into a prime (8004511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640 + ... + 6126.

It is an arithmetic number, because the mean of its divisors is an integer number (1145760).

Almost surely, 2^8004521 is an apocalyptic number.

It is an amenable number.

8004521 is a deficient number, since it is larger than the sum of its proper divisors (1161559).

8004521 is a wasteful number, since it uses less digits than its factorization.

8004521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263.

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

The square root of 8004521 is about 2829.2262193045. The cubic root of 8004521 is about 200.0376679052.

Adding to 8004521 its reverse (1254008), we get a palindrome (9258529).

The spelling of 8004521 in words is "eight million, four thousand, five hundred twenty-one".