541811 has 4 divisors (see below), whose sum is σ = 565392. Its totient is φ = 518232.

The previous prime is 541799. The next prime is 541817. The reversal of 541811 is 118145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118145 = 5 ⋅23629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-541811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (541817) 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, 11756 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (141348).

2⁵⁴¹⁸¹¹ is an apocalyptic number.

541811 is a deficient number, since it is larger than the sum of its proper divisors (23581).

541811 is a wasteful number, since it uses less digits than its factorization.

541811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23580.

The product of its digits is 160, while the sum is 20.

The square root of 541811 is about 736.0781208540. The cubic root of 541811 is about 81.5234604447.

Adding to 541811 its reverse (118145), we get a palindrome (659956).

The spelling of 541811 in words is "five hundred forty-one thousand, eight hundred eleven".