540047 has 4 divisors (see below), whose sum is σ = 545496. Its totient is φ = 534600.

The previous prime is 540041. The next prime is 540061. The reversal of 540047 is 740045.

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

It is a cyclic number.

It is not a de Polignac number, because 540047 - 2¹⁸ = 277903 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 (540041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573 + ... + 2774.

It is an arithmetic number, because the mean of its divisors is an integer number (136374).

2⁵⁴⁰⁰⁴⁷ is an apocalyptic number.

540047 is a deficient number, since it is larger than the sum of its proper divisors (5449).

540047 is a wasteful number, since it uses less digits than its factorization.

540047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 540047 is about 734.8789015886. The cubic root of 540047 is about 81.4348909780.

The spelling of 540047 in words is "five hundred forty thousand, forty-seven".