4440521 has 2 divisors, whose sum is σ = 4440522. Its totient is φ = 4440520.

The previous prime is 4440503. The next prime is 4440523. The reversal of 4440521 is 1250444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3367225 + 1073296 = 1835^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 4440521 - 2¹⁴ = 4424137 is a prime.

Together with 4440523, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4440493 and 4440502.

It is not a weakly prime, because it can be changed into another prime (4440523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2220260 + 2220261.

It is an arithmetic number, because the mean of its divisors is an integer number (2220261).

Almost surely, 2^4440521 is an apocalyptic number.

It is an amenable number.

4440521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4440521 is an equidigital number, since it uses as much as digits as its factorization.

4440521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 4440521 is about 2107.2543747730. The cubic root of 4440521 is about 164.3657438151.

Adding to 4440521 its reverse (1250444), we get a palindrome (5690965).

The spelling of 4440521 in words is "four million, four hundred forty thousand, five hundred twenty-one".