540905 has 8 divisors (see below), whose sum is σ = 653184. Its totient is φ = 430000.

The previous prime is 540901. The next prime is 540907. The reversal of 540905 is 509045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 540905 - 2² = 540901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1040 + ... + 1470.

It is an arithmetic number, because the mean of its divisors is an integer number (81648).

2⁵⁴⁰⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

540905 is a deficient number, since it is larger than the sum of its proper divisors (112279).

540905 is a wasteful number, since it uses less digits than its factorization.

540905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 540905 is about 735.4624395576. The cubic root of 540905 is about 81.4779947365.

The spelling of 540905 in words is "five hundred forty thousand, nine hundred five".