206445 has 8 divisors (see below), whose sum is σ = 330336. Its totient is φ = 110096.

The previous prime is 206419. The next prime is 206447. The reversal of 206445 is 544602.

It is a happy number.

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 206445 - 2⁵ = 206413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206447) 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, 6867 + ... + 6896.

It is an arithmetic number, because the mean of its divisors is an integer number (41292).

2²⁰⁶⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

206445 is a deficient number, since it is larger than the sum of its proper divisors (123891).

206445 is a wasteful number, since it uses less digits than its factorization.

206445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13771.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 206445 is about 454.3621903284. The cubic root of 206445 is about 59.1019018459.

The spelling of 206445 in words is "two hundred six thousand, four hundred forty-five".