540565 has 8 divisors (see below), whose sum is σ = 658008. Its totient is φ = 426240.

The previous prime is 540559. The next prime is 540577. The reversal of 540565 is 565045.

It can be written as a sum of positive squares in 4 ways, for example, as 53361 + 487204 = 231^2 + 698^2 .

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

It is not a de Polignac number, because 540565 - 2³ = 540557 is a prime.

It is a Duffinian number.

540565 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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, 376 + ... + 1105.

It is an arithmetic number, because the mean of its divisors is an integer number (82251).

2⁵⁴⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

540565 is a deficient number, since it is larger than the sum of its proper divisors (117443).

540565 is a wasteful number, since it uses less digits than its factorization.

540565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 540565 is about 735.2312561365. The cubic root of 540565 is about 81.4609194494.

The spelling of 540565 in words is "five hundred forty thousand, five hundred sixty-five".