445543 has 4 divisors (see below), whose sum is σ = 509200. Its totient is φ = 381888.

The previous prime is 445541. The next prime is 445567. The reversal of 445543 is 345544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 445543 - 2¹ = 445541 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 (445541) 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, 31818 + ... + 31831.

It is an arithmetic number, because the mean of its divisors is an integer number (127300).

2⁴⁴⁵⁵⁴³ is an apocalyptic number.

445543 is a deficient number, since it is larger than the sum of its proper divisors (63657).

445543 is an equidigital number, since it uses as much as digits as its factorization.

445543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63656.

The product of its digits is 4800, while the sum is 25.

The square root of 445543 is about 667.4900748326. The cubic root of 445543 is about 76.3771077124.

Subtracting from 445543 its reverse (345544), we obtain a palindrome (99999).

The spelling of 445543 in words is "four hundred forty-five thousand, five hundred forty-three".