540143 has 4 divisors (see below), whose sum is σ = 541848. Its totient is φ = 538440.

The previous prime is 540139. The next prime is 540149. The reversal of 540143 is 341045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341045 = 5 ⋅68209.

It is a cyclic number.

It is not a de Polignac number, because 540143 - 2² = 540139 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 (540149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221 + ... + 1062.

It is an arithmetic number, because the mean of its divisors is an integer number (135462).

2⁵⁴⁰¹⁴³ is an apocalyptic number.

540143 is a deficient number, since it is larger than the sum of its proper divisors (1705).

540143 is a wasteful number, since it uses less digits than its factorization.

540143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 540143 is about 734.9442155701. The cubic root of 540143 is about 81.4397160434.

Adding to 540143 its reverse (341045), we get a palindrome (881188).

The spelling of 540143 in words is "five hundred forty thousand, one hundred forty-three".