1109605 has 16 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 759696.

The previous prime is 1109579. The next prime is 1109609. The reversal of 1109605 is 5069011.

It is not a de Polignac number, because 1109605 - 2⁷ = 1109477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109609) 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 15 ways as a sum of consecutive naturals, for example, 1392 + ... + 2038.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^1109605 is an apocalyptic number.

It is an amenable number.

1109605 is a deficient number, since it is larger than the sum of its proper divisors (445595).

1109605 is an frugal number, since it uses more digits than its factorization.

1109605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 1109605 is about 1053.3778999011. The cubic root of 1109605 is about 103.5275973301.

The spelling of 1109605 in words is "one million, one hundred nine thousand, six hundred five".