1122409 has 4 divisors (see below), whose sum is σ = 1136016. Its totient is φ = 1108804.

The previous prime is 1122397. The next prime is 1122419. The reversal of 1122409 is 9042211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9042211 = 2017 ⋅4483.

It is a cyclic number.

It is not a de Polignac number, because 1122409 - 2⁷ = 1122281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1122419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6679 + ... + 6844.

It is an arithmetic number, because the mean of its divisors is an integer number (284004).

2^1122409 is an apocalyptic number.

It is an amenable number.

1122409 is a deficient number, since it is larger than the sum of its proper divisors (13607).

1122409 is an equidigital number, since it uses as much as digits as its factorization.

1122409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13606.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1122409 is about 1059.4380585952. The cubic root of 1122409 is about 103.9242853745.

The spelling of 1122409 in words is "one million, one hundred twenty-two thousand, four hundred nine".