340205 has 4 divisors (see below), whose sum is σ = 408252. Its totient is φ = 272160.

The previous prime is 340201. The next prime is 340211. The reversal of 340205 is 502043.

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 249001 + 91204 = 499^2 + 302^2 .

It is not a de Polignac number, because 340205 - 2² = 340201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 340205.

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 340205.

It is not an unprimeable number, because it can be changed into a prime (340201) 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, 34016 + ... + 34025.

It is an arithmetic number, because the mean of its divisors is an integer number (102063).

2³⁴⁰²⁰⁵ is an apocalyptic number.

It is an amenable number.

340205 is a deficient number, since it is larger than the sum of its proper divisors (68047).

340205 is an equidigital number, since it uses as much as digits as its factorization.

340205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68046.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 340205 is about 583.2709490451. The cubic root of 340205 is about 69.8093451417.

Adding to 340205 its reverse (502043), we get a palindrome (842248).

It can be divided in two parts, 340 and 205, that added together give a palindrome (545).

The spelling of 340205 in words is "three hundred forty thousand, two hundred five".