445603 has 4 divisors (see below), whose sum is σ = 448128. Its totient is φ = 443080.

The previous prime is 445597. The next prime is 445619. The reversal of 445603 is 306544.

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 445603 - 2⁹ = 445091 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (112032).

2⁴⁴⁵⁶⁰³ is an apocalyptic number.

445603 is a deficient number, since it is larger than the sum of its proper divisors (2525).

445603 is a wasteful number, since it uses less digits than its factorization.

445603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 445603 is about 667.5350178081. The cubic root of 445603 is about 76.3805360539.

The spelling of 445603 in words is "four hundred forty-five thousand, six hundred three".