1111003 has 4 divisors (see below), whose sum is σ = 1113280. Its totient is φ = 1108728.

The previous prime is 1110997. The next prime is 1111007. The reversal of 1111003 is 3001111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3001111 = 103 ⋅29137.

It is a cyclic number.

It is not a de Polignac number, because 1111003 - 2⁵ = 1110971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111007) 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, 75 + ... + 1492.

It is an arithmetic number, because the mean of its divisors is an integer number (278320).

2^1111003 is an apocalyptic number.

1111003 is a deficient number, since it is larger than the sum of its proper divisors (2277).

1111003 is an equidigital number, since it uses as much as digits as its factorization.

1111003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 3, while the sum is 7.

The square root of 1111003 is about 1054.0412705393. The cubic root of 1111003 is about 103.5710574926.

Adding to 1111003 its reverse (3001111), we get a palindrome (4112114).

The spelling of 1111003 in words is "one million, one hundred eleven thousand, three".