11001003 has 16 divisors (see below), whose sum is σ = 15864576. Its totient is φ = 6740640.

The previous prime is 11000993. The next prime is 11001007. The reversal of 11001003 is 30010011.

It is not a de Polignac number, because 11001003 - 2⁵ = 11000971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11000982 and 11001000.

It is not an unprimeable number, because it can be changed into a prime (11001007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11676 + ... + 12582.

It is an arithmetic number, because the mean of its divisors is an integer number (991536).

Almost surely, 2^11001003 is an apocalyptic number.

11001003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11001003 is a deficient number, since it is larger than the sum of its proper divisors (4863573).

11001003 is a wasteful number, since it uses less digits than its factorization.

11001003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234.

The product of its (nonzero) digits is 3, while the sum is 6.

The square root of 11001003 is about 3316.7759948480. The cubic root of 11001003 is about 222.4047684031.

Adding to 11001003 its reverse (30010011), we get a palindrome (41011014).

The spelling of 11001003 in words is "eleven million, one thousand, three".