441509 has 4 divisors (see below), whose sum is σ = 443520. Its totient is φ = 439500.

The previous prime is 441499. The next prime is 441517. The reversal of 441509 is 905144.

It is a happy number.

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 441509 - 2¹² = 437413 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441569) 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 3 ways as a sum of consecutive naturals, for example, 629 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2⁴⁴¹⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

441509 is a deficient number, since it is larger than the sum of its proper divisors (2011).

441509 is a wasteful number, since it uses less digits than its factorization.

441509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 441509 is about 664.4614360518. The cubic root of 441509 is about 76.1458993275.

The spelling of 441509 in words is "four hundred forty-one thousand, five hundred nine".