1103391 has 6 divisors (see below), whose sum is σ = 1593800. Its totient is φ = 735588.

The previous prime is 1103371. The next prime is 1103437. The reversal of 1103391 is 1933011.

It is not a de Polignac number, because 1103391 - 2⁹ = 1102879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61291 + ... + 61308.

2^1103391 is an apocalyptic number.

1103391 is a deficient number, since it is larger than the sum of its proper divisors (490409).

1103391 is a wasteful number, since it uses less digits than its factorization.

1103391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122605 (or 122602 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 1103391 is about 1050.4242000259. The cubic root of 1103391 is about 103.3339773344. Note that the first 3 decimals are identical.

The spelling of 1103391 in words is "one million, one hundred three thousand, three hundred ninety-one".