445403 has 4 divisors (see below), whose sum is σ = 509040. Its totient is φ = 381768.

The previous prime is 445363. The next prime is 445427. The reversal of 445403 is 304544.

It is a happy number.

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 445403 - 2⁶ = 445339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (445433) 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, 31808 + ... + 31821.

It is an arithmetic number, because the mean of its divisors is an integer number (127260).

2⁴⁴⁵⁴⁰³ is an apocalyptic number.

445403 is a deficient number, since it is larger than the sum of its proper divisors (63637).

445403 is an equidigital number, since it uses as much as digits as its factorization.

445403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63636.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 445403 is about 667.3851961199. The cubic root of 445403 is about 76.3691070516.

Adding to 445403 its reverse (304544), we get a palindrome (749947).

It can be divided in two parts, 445 and 403, that added together give a palindrome (848).

The spelling of 445403 in words is "four hundred forty-five thousand, four hundred three".