540005 has 8 divisors (see below), whose sum is σ = 686232. Its totient is φ = 406528.

The previous prime is 539993. The next prime is 540041. The reversal of 540005 is 500045.

540005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 101761 + 438244 = 319^2 + 662^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3092 + ... + 3261.

It is an arithmetic number, because the mean of its divisors is an integer number (85779).

2⁵⁴⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

540005 is a deficient number, since it is larger than the sum of its proper divisors (146227).

540005 is a wasteful number, since it uses less digits than its factorization.

540005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6375.

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 540005 is about 734.8503248962. The cubic root of 540005 is about 81.4327798320.

The spelling of 540005 in words is "five hundred forty thousand, five".