1003543 has 2 divisors, whose sum is σ = 1003544. Its totient is φ = 1003542.

The previous prime is 1003517. The next prime is 1003549. The reversal of 1003543 is 3453001.

1003543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1003543 - 2¹⁷ = 872471 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1003549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501771 + 501772.

It is an arithmetic number, because the mean of its divisors is an integer number (501772).

2^1003543 is an apocalyptic number.

1003543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003543 is an equidigital number, since it uses as much as digits as its factorization.

1003543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 1003543 is about 1001.7699336674. The cubic root of 1003543 is about 100.1179607978.

Adding to 1003543 its reverse (3453001), we get a palindrome (4456544).

The spelling of 1003543 in words is "one million, three thousand, five hundred forty-three".