1103891 has 4 divisors (see below), whose sum is σ = 1107000. Its totient is φ = 1100784.

The previous prime is 1103873. The next prime is 1103899. The reversal of 1103891 is 1983011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1983011 = 19 ⋅104369.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103899) 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, 941 + ... + 1758.

It is an arithmetic number, because the mean of its divisors is an integer number (276750).

2^1103891 is an apocalyptic number.

1103891 is a deficient number, since it is larger than the sum of its proper divisors (3109).

1103891 is an equidigital number, since it uses as much as digits as its factorization.

1103891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1103891 is about 1050.6621721562. The cubic root of 1103891 is about 103.3495835237.

The spelling of 1103891 in words is "one million, one hundred three thousand, eight hundred ninety-one".