1224209 has 12 divisors (see below), whose sum is σ = 1452672. Its totient is φ = 1010160.

The previous prime is 1224203. The next prime is 1224217. The reversal of 1224209 is 9024221.

It is not a de Polignac number, because 1224209 - 2⁴ = 1224193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224203) 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, 20039 + ... + 20099.

It is an arithmetic number, because the mean of its divisors is an integer number (121056).

2^1224209 is an apocalyptic number.

It is an amenable number.

1224209 is a deficient number, since it is larger than the sum of its proper divisors (228463).

1224209 is an frugal number, since it uses more digits than its factorization.

1224209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1224209 is about 1106.4397859802. The cubic root of 1224209 is about 106.9757128910.

The spelling of 1224209 in words is "one million, two hundred twenty-four thousand, two hundred nine".