441661 has 4 divisors (see below), whose sum is σ = 481824. Its totient is φ = 401500.

The previous prime is 441647. The next prime is 441667. The reversal of 441661 is 166144.

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 not a de Polignac number, because 441661 - 2¹¹ = 439613 is a prime.

It is a Duffinian number.

441661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441667) 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, 20065 + ... + 20086.

It is an arithmetic number, because the mean of its divisors is an integer number (120456).

2⁴⁴¹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

441661 is a deficient number, since it is larger than the sum of its proper divisors (40163).

441661 is a wasteful number, since it uses less digits than its factorization.

441661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40162.

The product of its digits is 576, while the sum is 22.

The square root of 441661 is about 664.5758045551. The cubic root of 441661 is about 76.1546366720.

The spelling of 441661 in words is "four hundred forty-one thousand, six hundred sixty-one".