540791 has 4 divisors (see below), whose sum is σ = 542400. Its totient is φ = 539184.

The previous prime is 540781. The next prime is 540803. The reversal of 540791 is 197045.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197045 = 5 ⋅39409.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540791 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 540791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540751) 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, 86 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (135600).

2⁵⁴⁰⁷⁹¹ is an apocalyptic number.

540791 is a deficient number, since it is larger than the sum of its proper divisors (1609).

540791 is a wasteful number, since it uses less digits than its factorization.

540791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 540791 is about 735.3849332153. The cubic root of 540791 is about 81.4722702908.

It can be divided in two parts, 540 and 791, that added together give a palindrome (1331).

The spelling of 540791 in words is "five hundred forty thousand, seven hundred ninety-one".