4044521 has 8 divisors (see below), whose sum is σ = 4612104. Its totient is φ = 3513600.

The previous prime is 4044517. The next prime is 4044529. The reversal of 4044521 is 1254404.

It can be written as a sum of positive squares in 4 ways, for example, as 400 + 4044121 = 20^2 + 2011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4044521 - 2² = 4044517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4044493 and 4044502.

It is not an unprimeable number, because it can be changed into a prime (4044529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8930 + ... + 9371.

It is an arithmetic number, because the mean of its divisors is an integer number (576513).

Almost surely, 2^4044521 is an apocalyptic number.

It is an amenable number.

4044521 is a deficient number, since it is larger than the sum of its proper divisors (567583).

4044521 is a wasteful number, since it uses less digits than its factorization.

4044521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18331.

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

The square root of 4044521 is about 2011.0994505494. The cubic root of 4044521 is about 159.3268726141.

Adding to 4044521 its reverse (1254404), we get a palindrome (5298925).

The spelling of 4044521 in words is "four million, forty-four thousand, five hundred twenty-one".