445643 has 12 divisors (see below), whose sum is σ = 510720. Its totient is φ = 388080.

The previous prime is 445633. The next prime is 445649. The reversal of 445643 is 346544.

It is not a de Polignac number, because 445643 - 2¹² = 441547 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445643.

It is not an unprimeable number, because it can be changed into a prime (445649) 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 11 ways as a sum of consecutive naturals, for example, 3446 + ... + 3572.

It is an arithmetic number, because the mean of its divisors is an integer number (42560).

2⁴⁴⁵⁶⁴³ is an apocalyptic number.

445643 is a deficient number, since it is larger than the sum of its proper divisors (65077).

445643 is a wasteful number, since it uses less digits than its factorization.

445643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 167 counting only the distinct ones).

The product of its digits is 5760, while the sum is 26.

The square root of 445643 is about 667.5649781107. The cubic root of 445643 is about 76.3828214440.

Subtracting from 445643 its reverse (346544), we obtain a palindrome (99099).

The spelling of 445643 in words is "four hundred forty-five thousand, six hundred forty-three".