1143003 has 4 divisors (see below), whose sum is σ = 1524008. Its totient is φ = 762000.

The previous prime is 1142971. The next prime is 1143013. The reversal of 1143003 is 3003411.

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

It is not a de Polignac number, because 1143003 - 2⁵ = 1142971 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143003.

It is not an unprimeable number, because it can be changed into a prime (1143013) 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, 190498 + ... + 190503.

It is an arithmetic number, because the mean of its divisors is an integer number (381002).

2^1143003 is an apocalyptic number.

1143003 is a deficient number, since it is larger than the sum of its proper divisors (381005).

1143003 is an equidigital number, since it uses as much as digits as its factorization.

1143003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381004.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1143003 is about 1069.1131839052. The cubic root of 1143003 is about 104.5560393247.

Adding to 1143003 its reverse (3003411), we get a palindrome (4146414).

The spelling of 1143003 in words is "one million, one hundred forty-three thousand, three".