540291 has 4 divisors (see below), whose sum is σ = 720392. Its totient is φ = 360192.

The previous prime is 540283. The next prime is 540301. The reversal of 540291 is 192045.

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

It is not a de Polignac number, because 540291 - 2³ = 540283 is a prime.

It is a D-number.

It is a Duffinian number.

540291 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (540251) 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, 90046 + ... + 90051.

It is an arithmetic number, because the mean of its divisors is an integer number (180098).

2⁵⁴⁰²⁹¹ is an apocalyptic number.

540291 is a deficient number, since it is larger than the sum of its proper divisors (180101).

540291 is a wasteful number, since it uses less digits than its factorization.

540291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180100.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 540291 is about 735.0448965880. The cubic root of 540291 is about 81.4471535660.

The spelling of 540291 in words is "five hundred forty thousand, two hundred ninety-one".