1143543 has 4 divisors (see below), whose sum is σ = 1524728. Its totient is φ = 762360.

The previous prime is 1143529. The next prime is 1143551. The reversal of 1143543 is 3453411.

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

It is a de Polignac number, because none of the positive numbers 2^k-1143543 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190588 + ... + 190593.

It is an arithmetic number, because the mean of its divisors is an integer number (381182).

2^1143543 is an apocalyptic number.

1143543 is a deficient number, since it is larger than the sum of its proper divisors (381185).

1143543 is an equidigital number, since it uses as much as digits as its factorization.

1143543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381184.

The product of its digits is 720, while the sum is 21.

The square root of 1143543 is about 1069.3656998427. The cubic root of 1143543 is about 104.5725022072.

Adding to 1143543 its reverse (3453411), we get a palindrome (4596954).

The spelling of 1143543 in words is "one million, one hundred forty-three thousand, five hundred forty-three".