8000521 has 4 divisors (see below), whose sum is σ = 8035092. Its totient is φ = 7965952.

The previous prime is 8000519. The next prime is 8000533. The reversal of 8000521 is 1250008.

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 2524921 + 5475600 = 1589^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 8000521 - 2¹ = 8000519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8000495 and 8000504.

It is not an unprimeable number, because it can be changed into a prime (8000561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16936 + ... + 17401.

It is an arithmetic number, because the mean of its divisors is an integer number (2008773).

Almost surely, 2^8000521 is an apocalyptic number.

It is an amenable number.

8000521 is a deficient number, since it is larger than the sum of its proper divisors (34571).

8000521 is a wasteful number, since it uses less digits than its factorization.

8000521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34570.

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

The square root of 8000521 is about 2828.5192239050. The cubic root of 8000521 is about 200.0043415724.

Adding to 8000521 its reverse (1250008), we get a palindrome (9250529).

The spelling of 8000521 in words is "eight million, five hundred twenty-one", and thus it is an aban number.