540543 has 4 divisors (see below), whose sum is σ = 720728. Its totient is φ = 360360.

The previous prime is 540541. The next prime is 540557. The reversal of 540543 is 345045.

It is a happy number.

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

It is not a de Polignac number, because 540543 - 2¹ = 540541 is a prime.

It is a D-number.

It is a Duffinian number.

540543 is a lucky number.

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 540543.

It is not an unprimeable number, because it can be changed into a prime (540541) 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, 90088 + ... + 90093.

It is an arithmetic number, because the mean of its divisors is an integer number (180182).

2⁵⁴⁰⁵⁴³ is an apocalyptic number.

540543 is a deficient number, since it is larger than the sum of its proper divisors (180185).

540543 is a wasteful number, since it uses less digits than its factorization.

540543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180184.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 540543 is about 735.2162947052. The cubic root of 540543 is about 81.4598143312.

Adding to 540543 its reverse (345045), we get a palindrome (885588).

The spelling of 540543 in words is "five hundred forty thousand, five hundred forty-three".