136205 has 4 divisors (see below), whose sum is σ = 163452. Its totient is φ = 108960.

The previous prime is 136193. The next prime is 136207. The reversal of 136205 is 502631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 106276 + 29929 = 326^2 + 173^2 .

It is not a de Polignac number, because 136205 - 2⁴ = 136189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 136205.

It is not an unprimeable number, because it can be changed into a prime (136207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13616 + ... + 13625.

It is an arithmetic number, because the mean of its divisors is an integer number (40863).

2¹³⁶²⁰⁵ is an apocalyptic number.

It is an amenable number.

136205 is a deficient number, since it is larger than the sum of its proper divisors (27247).

136205 is an equidigital number, since it uses as much as digits as its factorization.

136205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27246.

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

The square root of 136205 is about 369.0596157804. The cubic root of 136205 is about 51.4514577004.

Adding to 136205 its reverse (502631), we get a palindrome (638836).

The spelling of 136205 in words is "one hundred thirty-six thousand, two hundred five".