1091103 has 16 divisors (see below), whose sum is σ = 1587936. Its totient is φ = 662400.

The previous prime is 1091071. The next prime is 1091119. The reversal of 1091103 is 3011901.

It is not a de Polignac number, because 1091103 - 2⁵ = 1091071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091173) 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, 3801 + ... + 4077.

It is an arithmetic number, because the mean of its divisors is an integer number (99246).

2^1091103 is an apocalyptic number.

1091103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1091103 is a deficient number, since it is larger than the sum of its proper divisors (496833).

1091103 is a wasteful number, since it uses less digits than its factorization.

1091103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 1091103 is about 1044.5587585196. The cubic root of 1091103 is about 102.9489488425.

The spelling of 1091103 in words is "one million, ninety-one thousand, one hundred three".