201845 has 16 divisors (see below), whose sum is σ = 284160. Its totient is φ = 134784.

The previous prime is 201833. The next prime is 201847. The reversal of 201845 is 548102.

201845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 201845 - 2⁴ = 201829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201847) 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, 2516 + ... + 2594.

It is an arithmetic number, because the mean of its divisors is an integer number (17760).

2²⁰¹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

201845 is a deficient number, since it is larger than the sum of its proper divisors (82315).

201845 is an equidigital number, since it uses as much as digits as its factorization.

201845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 201845 is about 449.2716327568. The cubic root of 201845 is about 58.6596317035.

Adding to 201845 its reverse (548102), we get a palindrome (749947).

The spelling of 201845 in words is "two hundred one thousand, eight hundred forty-five".