1222117 has 4 divisors (see below), whose sum is σ = 1316140. Its totient is φ = 1128096.

The previous prime is 1222097. The next prime is 1222129. The reversal of 1222117 is 7112221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75076 + 1147041 = 274^2 + 1071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222117 is a prime.

It is a Duffinian number.

1222117 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222157) 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, 46992 + ... + 47017.

It is an arithmetic number, because the mean of its divisors is an integer number (329035).

2^1222117 is an apocalyptic number.

It is an amenable number.

1222117 is a deficient number, since it is larger than the sum of its proper divisors (94023).

1222117 is an equidigital number, since it uses as much as digits as its factorization.

1222117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94022.

The product of its digits is 56, while the sum is 16.

The square root of 1222117 is about 1105.4940072203. The cubic root of 1222117 is about 106.9147426946.

Adding to 1222117 its reverse (7112221), we get a palindrome (8334338).

The spelling of 1222117 in words is "one million, two hundred twenty-two thousand, one hundred seventeen".