4441521 has 8 divisors (see below), whose sum is σ = 6768064. Its totient is φ = 2538000.

The previous prime is 4441499. The next prime is 4441523. The reversal of 4441521 is 1251444.

4441521 = T₁₁₂₃ + T₁₁₂₄ + ... + T₁₁₂₉.

It is a happy number.

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

It is not a de Polignac number, because 4441521 - 2⁶ = 4441457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 211501 = 4441521 / (4 + 4 + 4 + 1 + 5 + 2 + 1).

It is a Duffinian number.

4441521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4441523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105730 + ... + 105771.

It is an arithmetic number, because the mean of its divisors is an integer number (846008).

Almost surely, 2^4441521 is an apocalyptic number.

It is an amenable number.

4441521 is a deficient number, since it is larger than the sum of its proper divisors (2326543).

4441521 is a wasteful number, since it uses less digits than its factorization.

4441521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211511.

The product of its digits is 640, while the sum is 21.

The square root of 4441521 is about 2107.4916369941. The cubic root of 4441521 is about 164.3780812118.

Adding to 4441521 its reverse (1251444), we get a palindrome (5692965).

It can be divided in two parts, 444152 and 1, that added together give a triangular number (444153 = T₉₄₂).

The spelling of 4441521 in words is "four million, four hundred forty-one thousand, five hundred twenty-one".