565543 has 4 divisors (see below), whose sum is σ = 616968. Its totient is φ = 514120.

The previous prime is 565519. The next prime is 565549. The reversal of 565543 is 345565.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 565543 - 2⁵ = 565511 is a prime.

565543 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25696 + ... + 25717.

It is an arithmetic number, because the mean of its divisors is an integer number (154242).

2⁵⁶⁵⁵⁴³ is an apocalyptic number.

565543 is a deficient number, since it is larger than the sum of its proper divisors (51425).

565543 is a wasteful number, since it uses less digits than its factorization.

565543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51424.

The product of its digits is 9000, while the sum is 28.

The square root of 565543 is about 752.0259304040. The cubic root of 565543 is about 82.6967693728.

The spelling of 565543 in words is "five hundred sixty-five thousand, five hundred forty-three".