1222009 has 4 divisors (see below), whose sum is σ = 1236816. Its totient is φ = 1207204.

The previous prime is 1222003. The next prime is 1222019. The reversal of 1222009 is 9002221.

It is a happy number.

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: 9002221 = 347 ⋅25943.

It is a cyclic number.

It is not a de Polignac number, because 1222009 - 2¹¹ = 1219961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221983 and 1222001.

It is not an unprimeable number, because it can be changed into a prime (1222003) 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, 7279 + ... + 7444.

It is an arithmetic number, because the mean of its divisors is an integer number (309204).

2^1222009 is an apocalyptic number.

It is an amenable number.

1222009 is a deficient number, since it is larger than the sum of its proper divisors (14807).

1222009 is an equidigital number, since it uses as much as digits as its factorization.

1222009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14806.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1222009 is about 1105.4451592006. The cubic root of 1222009 is about 106.9115932056.

The spelling of 1222009 in words is "one million, two hundred twenty-two thousand, nine".