445305 has 16 divisors (see below), whose sum is σ = 814464. Its totient is φ = 203520.

The previous prime is 445297. The next prime is 445307. The reversal of 445305 is 503544.

445305 = T₈₆ + T₈₇ + ... + T₁₄₈.

It is a happy number.

It is not a de Polignac number, because 445305 - 2³ = 445297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 445305.

It is not an unprimeable number, because it can be changed into a prime (445307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2016 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (50904).

2⁴⁴⁵³⁰⁵ is an apocalyptic number.

It is an amenable number.

445305 is a deficient number, since it is larger than the sum of its proper divisors (369159).

445305 is a wasteful number, since it uses less digits than its factorization.

With its successor (445306) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (4256).

445305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 445305 is about 667.3117712134. The cubic root of 445305 is about 76.3635055914.

Adding to 445305 its reverse (503544), we get a palindrome (948849).

The spelling of 445305 in words is "four hundred forty-five thousand, three hundred five".