4424521 has 4 divisors (see below), whose sum is σ = 4440772. Its totient is φ = 4408272.

The previous prime is 4424503. The next prime is 4424527. The reversal of 4424521 is 1254244.

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 1990921 + 2433600 = 1411^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 4424521 - 2⁵ = 4424489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4424492 and 4424501.

It is not an unprimeable number, because it can be changed into a prime (4424527) 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, 7710 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (1110193).

Almost surely, 2^4424521 is an apocalyptic number.

It is an amenable number.

4424521 is a deficient number, since it is larger than the sum of its proper divisors (16251).

4424521 is a wasteful number, since it uses less digits than its factorization.

4424521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16250.

The product of its digits is 1280, while the sum is 22.

The square root of 4424521 is about 2103.4545395611. The cubic root of 4424521 is about 164.1680930703.

Adding to 4424521 its reverse (1254244), we get a palindrome (5678765).

The spelling of 4424521 in words is "four million, four hundred twenty-four thousand, five hundred twenty-one".