1111609 has 4 divisors (see below), whose sum is σ = 1125760. Its totient is φ = 1097460.

The previous prime is 1111577. The next prime is 1111637. The reversal of 1111609 is 9061111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111609 - 2⁵ = 1111577 is a prime.

It is a Duffinian number.

1111609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1111639) 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 3 ways as a sum of consecutive naturals, for example, 6957 + ... + 7114.

It is an arithmetic number, because the mean of its divisors is an integer number (281440).

2^1111609 is an apocalyptic number.

It is an amenable number.

1111609 is a deficient number, since it is larger than the sum of its proper divisors (14151).

1111609 is an equidigital number, since it uses as much as digits as its factorization.

1111609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14150.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 1111609 is about 1054.3286963751. The cubic root of 1111609 is about 103.5898851203.

The spelling of 1111609 in words is "one million, one hundred eleven thousand, six hundred nine".