1222205 has 8 divisors (see below), whose sum is σ = 1517400. Its totient is φ = 943936.

The previous prime is 1222187. The next prime is 1222219. The reversal of 1222205 is 5022221.

It can be written as a sum of positive squares in 4 ways, for example, as 27556 + 1194649 = 166^2 + 1093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222205 - 2²⁰ = 173629 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222205.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4070 + ... + 4359.

It is an arithmetic number, because the mean of its divisors is an integer number (189675).

2^1222205 is an apocalyptic number.

It is an amenable number.

1222205 is a deficient number, since it is larger than the sum of its proper divisors (295195).

1222205 is an equidigital number, since it uses as much as digits as its factorization.

1222205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8463.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1222205 is about 1105.5338077146. The cubic root of 1222205 is about 106.9173088078.

Adding to 1222205 its reverse (5022221), we get a palindrome (6244426).

The spelling of 1222205 in words is "one million, two hundred twenty-two thousand, two hundred five".