1109409 has 12 divisors (see below), whose sum is σ = 1720944. Its totient is φ = 633864.

The previous prime is 1109401. The next prime is 1109411. The reversal of 1109409 is 9049011.

It is not a de Polignac number, because 1109409 - 2³ = 1109401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1109401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3627 + ... + 3920.

It is an arithmetic number, because the mean of its divisors is an integer number (143412).

2^1109409 is an apocalyptic number.

It is an amenable number.

1109409 is a deficient number, since it is larger than the sum of its proper divisors (611535).

1109409 is an equidigital number, since it uses as much as digits as its factorization.

1109409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7564 (or 7557 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1109409 is about 1053.2848617539. The cubic root of 1109409 is about 103.5215012857.

The spelling of 1109409 in words is "one million, one hundred nine thousand, four hundred nine".