509043 has 4 divisors (see below), whose sum is σ = 678728. Its totient is φ = 339360.

The previous prime is 509027. The next prime is 509053. The reversal of 509043 is 340905.

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

It is not a de Polignac number, because 509043 - 2⁴ = 509027 is a prime.

It is a D-number.

It is a Duffinian number.

509043 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509023) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 84838 + ... + 84843.

It is an arithmetic number, because the mean of its divisors is an integer number (169682).

2⁵⁰⁹⁰⁴³ is an apocalyptic number.

509043 is a deficient number, since it is larger than the sum of its proper divisors (169685).

509043 is a wasteful number, since it uses less digits than its factorization.

509043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169684.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 509043 is about 713.4724942140. The cubic root of 509043 is about 79.8456921382.

Adding to 509043 its reverse (340905), we get a palindrome (849948).

The spelling of 509043 in words is "five hundred nine thousand, forty-three".