540129 has 4 divisors (see below), whose sum is σ = 720176. Its totient is φ = 360084.

The previous prime is 540121. The next prime is 540139. The reversal of 540129 is 921045.

540129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 540129 - 2³ = 540121 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (540121) 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, 90019 + ... + 90024.

It is an arithmetic number, because the mean of its divisors is an integer number (180044).

2⁵⁴⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

540129 is a deficient number, since it is larger than the sum of its proper divisors (180047).

540129 is a wasteful number, since it uses less digits than its factorization.

540129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180046.

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

The square root of 540129 is about 734.9346909760. The cubic root of 540129 is about 81.4390124236.

The spelling of 540129 in words is "five hundred forty thousand, one hundred twenty-nine".