1000543 has 4 divisors (see below), whose sum is σ = 1003168. Its totient is φ = 997920.

The previous prime is 1000541. The next prime is 1000547. The reversal of 1000543 is 3450001.

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 1000543 - 2¹ = 1000541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000541) 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, 618 + ... + 1543.

It is an arithmetic number, because the mean of its divisors is an integer number (250792).

2^1000543 is an apocalyptic number.

1000543 is a deficient number, since it is larger than the sum of its proper divisors (2625).

1000543 is an equidigital number, since it uses as much as digits as its factorization.

1000543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 1000543 is about 1000.2714631539. The cubic root of 1000543 is about 100.0180967249.

Adding to 1000543 its reverse (3450001), we get a palindrome (4450544).

The spelling of 1000543 in words is "one million, five hundred forty-three", and thus it is an aban number.