540239 has 8 divisors (see below), whose sum is σ = 626688. Its totient is φ = 456120.

The previous prime is 540233. The next prime is 540251. The reversal of 540239 is 932045.

540239 = T₆ + T₇ + ... + T₁₄₇.

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

It is a de Polignac number, because none of the positive numbers 2^k-540239 is a prime.

It is a d-powerful number, because it can be written as 5³ + 4³ + 2¹¹ + 0 + 3¹² + 9⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540233) 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 7 ways as a sum of consecutive naturals, for example, 47 + ... + 1040.

It is an arithmetic number, because the mean of its divisors is an integer number (78336).

2⁵⁴⁰²³⁹ is an apocalyptic number.

540239 is a deficient number, since it is larger than the sum of its proper divisors (86449).

540239 is a wasteful number, since it uses less digits than its factorization.

540239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 540239 is about 735.0095237478. The cubic root of 540239 is about 81.4445405372. Note that the first 3 decimals are identical.

The spelling of 540239 in words is "five hundred forty thousand, two hundred thirty-nine".