445565 has 4 divisors (see below), whose sum is σ = 534684. Its totient is φ = 356448.

The previous prime is 445541. The next prime is 445567. The reversal of 445565 is 565544.

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 177241 + 268324 = 421^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 445565 - 2¹⁴ = 429181 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445567) 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, 44552 + ... + 44561.

It is an arithmetic number, because the mean of its divisors is an integer number (133671).

2⁴⁴⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

445565 is a deficient number, since it is larger than the sum of its proper divisors (89119).

445565 is an equidigital number, since it uses as much as digits as its factorization.

445565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89118.

The product of its digits is 12000, while the sum is 29.

The square root of 445565 is about 667.5065542749. The cubic root of 445565 is about 76.3783648067.

The spelling of 445565 in words is "four hundred forty-five thousand, five hundred sixty-five".