540205 has 4 divisors (see below), whose sum is σ = 648252. Its totient is φ = 432160.

The previous prime is 540203. The next prime is 540217. The reversal of 540205 is 502045.

It is a happy number.

540205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 233289 + 306916 = 483^2 + 554^2 .

It is not a de Polignac number, because 540205 - 2¹ = 540203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540203) 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, 54016 + ... + 54025.

It is an arithmetic number, because the mean of its divisors is an integer number (162063).

2⁵⁴⁰²⁰⁵ is an apocalyptic number.

It is an amenable number.

540205 is a deficient number, since it is larger than the sum of its proper divisors (108047).

540205 is a wasteful number, since it uses less digits than its factorization.

540205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108046.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 540205 is about 734.9863944319. The cubic root of 540205 is about 81.4428319277.

The spelling of 540205 in words is "five hundred forty thousand, two hundred five".