542565 has 16 divisors (see below), whose sum is σ = 964800. Its totient is φ = 289296.

The previous prime is 542557. The next prime is 542567. The reversal of 542565 is 565245.

It is not a de Polignac number, because 542565 - 2³ = 542557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

542565 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 542565.

It is not an unprimeable number, because it can be changed into a prime (542567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875 + ... + 2144.

It is an arithmetic number, because the mean of its divisors is an integer number (60300).

2⁵⁴²⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

542565 is a deficient number, since it is larger than the sum of its proper divisors (422235).

542565 is a wasteful number, since it uses less digits than its factorization.

542565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033 (or 4027 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 542565 is about 736.5901166863. The cubic root of 542565 is about 81.5612597248.

The spelling of 542565 in words is "five hundred forty-two thousand, five hundred sixty-five".