8244521 has 4 divisors (see below), whose sum is σ = 8400132. Its totient is φ = 8088912.

The previous prime is 8244517. The next prime is 8244527. The reversal of 8244521 is 1254428.

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 6451600 + 1792921 = 2540^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 8244521 - 2² = 8244517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8244527) 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, 77726 + ... + 77831.

It is an arithmetic number, because the mean of its divisors is an integer number (2100033).

Almost surely, 2^8244521 is an apocalyptic number.

It is an amenable number.

8244521 is a deficient number, since it is larger than the sum of its proper divisors (155611).

8244521 is a wasteful number, since it uses less digits than its factorization.

8244521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155610.

The product of its digits is 2560, while the sum is 26.

The square root of 8244521 is about 2871.3273933845. The cubic root of 8244521 is about 202.0172599048.

Adding to 8244521 its reverse (1254428), we get a palindrome (9498949).

The spelling of 8244521 in words is "eight million, two hundred forty-four thousand, five hundred twenty-one".