441721 has 4 divisors (see below), whose sum is σ = 504832. Its totient is φ = 378612.

The previous prime is 441713. The next prime is 441737. The reversal of 441721 is 127144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 441721 - 2³ = 441713 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31545 + ... + 31558.

It is an arithmetic number, because the mean of its divisors is an integer number (126208).

2⁴⁴¹⁷²¹ is an apocalyptic number.

It is an amenable number.

441721 is a deficient number, since it is larger than the sum of its proper divisors (63111).

441721 is an equidigital number, since it uses as much as digits as its factorization.

441721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63110.

The product of its digits is 224, while the sum is 19.

The square root of 441721 is about 664.6209445993. The cubic root of 441721 is about 76.1580850719.

Adding to 441721 its reverse (127144), we get a palindrome (568865).

The spelling of 441721 in words is "four hundred forty-one thousand, seven hundred twenty-one", and thus it is an iban number.