445865 has 8 divisors (see below), whose sum is σ = 611520. Its totient is φ = 305712.

The previous prime is 445853. The next prime is 445871. The reversal of 445865 is 568544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 445865 - 2¹⁰ = 444841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6335 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (76440).

2⁴⁴⁵⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

445865 is a deficient number, since it is larger than the sum of its proper divisors (165655).

445865 is a wasteful number, since it uses less digits than its factorization.

445865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12751.

The product of its digits is 19200, while the sum is 32.

The square root of 445865 is about 667.7312333567. The cubic root of 445865 is about 76.3955028739.

The spelling of 445865 in words is "four hundred forty-five thousand, eight hundred sixty-five".