206745 has 32 divisors (see below), whose sum is σ = 414720. Its totient is φ = 85440.

The previous prime is 206699. The next prime is 206749. The reversal of 206745 is 547602.

It is a happy number.

It is not a de Polignac number, because 206745 - 2⁸ = 206489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1066 + ... + 1244.

It is an arithmetic number, because the mean of its divisors is an integer number (12960).

2²⁰⁶⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

206745 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206745 is a wasteful number, since it uses less digits than its factorization.

206745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 206745 is about 454.6922035839. The cubic root of 206745 is about 59.1305163904.

It can be divided in two parts, 2067 and 45, that added together give a palindrome (2112).

The spelling of 206745 in words is "two hundred six thousand, seven hundred forty-five".