1224217 has 2 divisors, whose sum is σ = 1224218. Its totient is φ = 1224216.

The previous prime is 1224203. The next prime is 1224229. The reversal of 1224217 is 7124221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 430336 = 891^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224217 - 2⁷ = 1224089 is a prime.

1224217 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1224194 and 1224203.

It is not a weakly prime, because it can be changed into another prime (1224257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612108 + 612109.

It is an arithmetic number, because the mean of its divisors is an integer number (612109).

2^1224217 is an apocalyptic number.

It is an amenable number.

1224217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224217 is an equidigital number, since it uses as much as digits as its factorization.

1224217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 19.

The square root of 1224217 is about 1106.4434011733. The cubic root of 1224217 is about 106.9759459133.

Adding to 1224217 its reverse (7124221), we get a palindrome (8348438).

It can be divided in two parts, 1224 and 217, that added together give a palindrome (1441).

The spelling of 1224217 in words is "one million, two hundred twenty-four thousand, two hundred seventeen".