520543 has 4 divisors (see below), whose sum is σ = 547960. Its totient is φ = 493128.

The previous prime is 520529. The next prime is 520547. The reversal of 520543 is 345025.

It is a happy number.

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 520543 - 2⁹ = 520031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 27397 = 520543 / (5 + 2 + 0 + 5 + 4 + 3).

It is a d-powerful number, because it can be written as 5⁵ + 2 + 5⁷ + 0 + 4⁹ + 3¹¹ .

It is a self number, because there is not a number n which added to its sum of digits gives 520543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520547) 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, 13680 + ... + 13717.

It is an arithmetic number, because the mean of its divisors is an integer number (136990).

2⁵²⁰⁵⁴³ is an apocalyptic number.

520543 is a deficient number, since it is larger than the sum of its proper divisors (27417).

520543 is a wasteful number, since it uses less digits than its factorization.

520543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27416.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 520543 is about 721.4866596133. The cubic root of 520543 is about 80.4424958716.

Adding to 520543 its reverse (345025), we get a palindrome (865568).

The spelling of 520543 in words is "five hundred twenty thousand, five hundred forty-three".