1222217 has 4 divisors (see below), whose sum is σ = 1233540. Its totient is φ = 1210896.

The previous prime is 1222187. The next prime is 1222219. The reversal of 1222217 is 7122221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7122221 = 139 ⋅51239.

It can be written as a sum of positive squares in 2 ways, for example, as 383161 + 839056 = 619^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222217 - 2¹⁰ = 1221193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222195 and 1222204.

It is not an unprimeable number, because it can be changed into a prime (1222219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5498 + ... + 5715.

It is an arithmetic number, because the mean of its divisors is an integer number (308385).

2^1222217 is an apocalyptic number.

It is an amenable number.

1222217 is a deficient number, since it is larger than the sum of its proper divisors (11323).

1222217 is a wasteful number, since it uses less digits than its factorization.

1222217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11322.

The product of its digits is 112, while the sum is 17.

The square root of 1222217 is about 1105.5392349437. The cubic root of 1222217 is about 106.9176587228.

Adding to 1222217 its reverse (7122221), we get a palindrome (8344438).

The spelling of 1222217 in words is "one million, two hundred twenty-two thousand, two hundred seventeen".