1001103 has 4 divisors (see below), whose sum is σ = 1334808. Its totient is φ = 667400.

The previous prime is 1001093. The next prime is 1001107. The reversal of 1001103 is 3011001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001103 - 2⁴ = 1001087 is a prime.

It is a D-number.

1001103 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1001091 and 1001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166848 + ... + 166853.

It is an arithmetic number, because the mean of its divisors is an integer number (333702).

2^1001103 is an apocalyptic number.

1001103 is a deficient number, since it is larger than the sum of its proper divisors (333705).

1001103 is an equidigital number, since it uses as much as digits as its factorization.

1001103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333704.

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

The square root of 1001103 is about 1000.5513480077. The cubic root of 1001103 is about 100.0367531571.

Adding to 1001103 its reverse (3011001), we get a palindrome (4012104).

The spelling of 1001103 in words is "one million, one thousand, one hundred three".