845205 has 24 divisors (see below), whose sum is σ = 1421472. Its totient is φ = 428736.

The previous prime is 845203. The next prime is 845209. The reversal of 845205 is 502548.

It is not a de Polignac number, because 845205 - 2¹ = 845203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845203) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 12582 + ... + 12648.

It is an arithmetic number, because the mean of its divisors is an integer number (59228).

2⁸⁴⁵²⁰⁵ is an apocalyptic number.

It is an amenable number.

845205 is a deficient number, since it is larger than the sum of its proper divisors (576267).

845205 is a wasteful number, since it uses less digits than its factorization.

845205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 845205 is about 919.3503140805. The cubic root of 845205 is about 94.5483641464.

The spelling of 845205 in words is "eight hundred forty-five thousand, two hundred five".