201945 has 8 divisors (see below), whose sum is σ = 323136. Its totient is φ = 107696.

The previous prime is 201937. The next prime is 201947. The reversal of 201945 is 549102.

201945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 201945 - 2³ = 201937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6717 + ... + 6746.

It is an arithmetic number, because the mean of its divisors is an integer number (40392).

2²⁰¹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

201945 is a deficient number, since it is larger than the sum of its proper divisors (121191).

201945 is a wasteful number, since it uses less digits than its factorization.

201945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13471.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 201945 is about 449.3829102225. The cubic root of 201945 is about 58.6693173447.

The spelling of 201945 in words is "two hundred one thousand, nine hundred forty-five".