206135 has 4 divisors (see below), whose sum is σ = 247368. Its totient is φ = 164904.

The previous prime is 206123. The next prime is 206153. The reversal of 206135 is 531602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 206135 - 2⁸ = 205879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20609 + ... + 20618.

It is an arithmetic number, because the mean of its divisors is an integer number (61842).

2²⁰⁶¹³⁵ is an apocalyptic number.

206135 is a deficient number, since it is larger than the sum of its proper divisors (41233).

206135 is an equidigital number, since it uses as much as digits as its factorization.

206135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41232.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 206135 is about 454.0209246279. The cubic root of 206135 is about 59.0723043455.

Adding to 206135 its reverse (531602), we get a palindrome (737737).

The spelling of 206135 in words is "two hundred six thousand, one hundred thirty-five".