540081 has 16 divisors (see below), whose sum is σ = 813120. Its totient is φ = 354240.

The previous prime is 540079. The next prime is 540101. The reversal of 540081 is 180045.

540081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 540081 - 2¹ = 540079 is a prime.

It is a super-2 number, since 2×540081² = 583374973122, which contains 22 as substring.

540081 is a modest number, since divided by 81 gives 54 as remainder.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2121 + ... + 2361.

It is an arithmetic number, because the mean of its divisors is an integer number (50820).

2⁵⁴⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

540081 is a deficient number, since it is larger than the sum of its proper divisors (273039).

540081 is a wasteful number, since it uses less digits than its factorization.

540081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 540081 is about 734.9020342876. The cubic root of 540081 is about 81.4365999207.

The spelling of 540081 in words is "five hundred forty thousand, eighty-one".