445505 has 4 divisors (see below), whose sum is σ = 534612. Its totient is φ = 356400.

The previous prime is 445499. The next prime is 445507. The reversal of 445505 is 505544.

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 66049 + 379456 = 257^2 + 616^2 .

It is not a de Polignac number, because 445505 - 2¹⁸ = 183361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445507) 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, 44546 + ... + 44555.

It is an arithmetic number, because the mean of its divisors is an integer number (133653).

2⁴⁴⁵⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

445505 is a deficient number, since it is larger than the sum of its proper divisors (89107).

445505 is an equidigital number, since it uses as much as digits as its factorization.

445505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89106.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 445505 is about 667.4616093829. The cubic root of 445505 is about 76.3749362702.

The spelling of 445505 in words is "four hundred forty-five thousand, five hundred five".