539565 has 16 divisors (see below), whose sum is σ = 930048. Its totient is φ = 265536.

The previous prime is 539533. The next prime is 539573. The reversal of 539565 is 565935.

It is not a de Polignac number, because 539565 - 2⁵ = 539533 is a prime.

It is a super-2 number, since 2×539565² = 582260778450, which contains 22 as substring.

It is an Ulam number.

539565 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 539565.

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 15 ways as a sum of consecutive naturals, for example, 1189 + ... + 1578.

It is an arithmetic number, because the mean of its divisors is an integer number (58128).

2⁵³⁹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

539565 is a deficient number, since it is larger than the sum of its proper divisors (390483).

539565 is a wasteful number, since it uses less digits than its factorization.

539565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788.

The product of its digits is 20250, while the sum is 33.

The square root of 539565 is about 734.5508831933. The cubic root of 539565 is about 81.4106564818.

It can be divided in two parts, 5395 and 65, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 539565 in words is "five hundred thirty-nine thousand, five hundred sixty-five".