540811 has 4 divisors (see below), whose sum is σ = 553432. Its totient is φ = 528192.

The previous prime is 540809. The next prime is 540823. The reversal of 540811 is 118045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118045 = 5 ⋅23609.

It is a cyclic number.

It is not a de Polignac number, because 540811 - 2¹ = 540809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540851) 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, 6246 + ... + 6331.

It is an arithmetic number, because the mean of its divisors is an integer number (138358).

2⁵⁴⁰⁸¹¹ is an apocalyptic number.

540811 is a deficient number, since it is larger than the sum of its proper divisors (12621).

540811 is a wasteful number, since it uses less digits than its factorization.

540811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12620.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 540811 is about 735.3985314100. The cubic root of 540811 is about 81.4732746377.

Adding to 540811 its reverse (118045), we get a palindrome (658856).

The spelling of 540811 in words is "five hundred forty thousand, eight hundred eleven".