445205 has 4 divisors (see below), whose sum is σ = 534252. Its totient is φ = 356160.

The previous prime is 445199. The next prime is 445229. The reversal of 445205 is 502544.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64516 + 380689 = 254^2 + 617^2 .

It is not a de Polignac number, because 445205 - 2⁶ = 445141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44516 + ... + 44525.

It is an arithmetic number, because the mean of its divisors is an integer number (133563).

2⁴⁴⁵²⁰⁵ is an apocalyptic number.

It is an amenable number.

445205 is a deficient number, since it is larger than the sum of its proper divisors (89047).

445205 is an equidigital number, since it uses as much as digits as its factorization.

445205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89046.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 445205 is about 667.2368395105. The cubic root of 445205 is about 76.3577889685.

Adding to 445205 its reverse (502544), we get a palindrome (947749).

The spelling of 445205 in words is "four hundred forty-five thousand, two hundred five".