540865 has 16 divisors (see below), whose sum is σ = 716688. Its totient is φ = 389376.

The previous prime is 540863. The next prime is 540871. The reversal of 540865 is 568045.

It can be written as a sum of positive squares in 8 ways, for example, as 35344 + 505521 = 188^2 + 711^2 .

It is not a de Polignac number, because 540865 - 2¹ = 540863 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3367 + ... + 3523.

It is an arithmetic number, because the mean of its divisors is an integer number (44793).

2⁵⁴⁰⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

540865 is a deficient number, since it is larger than the sum of its proper divisors (175823).

540865 is a wasteful number, since it uses less digits than its factorization.

540865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 540865 is about 735.4352452800. The cubic root of 540865 is about 81.4759862507.

The spelling of 540865 in words is "five hundred forty thousand, eight hundred sixty-five".