8544521 has 4 divisors (see below), whose sum is σ = 8775492. Its totient is φ = 8313552.

The previous prime is 8544493. The next prime is 8544527. The reversal of 8544521 is 1254458.

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 3857296 + 4687225 = 1964^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 8544521 - 2⁶ = 8544457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8544527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115430 + ... + 115503.

It is an arithmetic number, because the mean of its divisors is an integer number (2193873).

Almost surely, 2^8544521 is an apocalyptic number.

It is an amenable number.

8544521 is a deficient number, since it is larger than the sum of its proper divisors (230971).

8544521 is a wasteful number, since it uses less digits than its factorization.

8544521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230970.

The product of its digits is 6400, while the sum is 29.

The square root of 8544521 is about 2923.1012640687. The cubic root of 8544521 is about 204.4384472900.

Adding to 8544521 its reverse (1254458), we get a palindrome (9798979).

The spelling of 8544521 in words is "eight million, five hundred forty-four thousand, five hundred twenty-one".