1220317 has 4 divisors (see below), whose sum is σ = 1394656. Its totient is φ = 1045980.

The previous prime is 1220309. The next prime is 1220327. The reversal of 1220317 is 7130221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220317 - 2³ = 1220309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87159 + ... + 87172.

It is an arithmetic number, because the mean of its divisors is an integer number (348664).

2^1220317 is an apocalyptic number.

It is an amenable number.

1220317 is a deficient number, since it is larger than the sum of its proper divisors (174339).

1220317 is an equidigital number, since it uses as much as digits as its factorization.

1220317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174338.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1220317 is about 1104.6795915559. The cubic root of 1220317 is about 106.8622269655.

Adding to 1220317 its reverse (7130221), we get a palindrome (8350538).

The spelling of 1220317 in words is "one million, two hundred twenty thousand, three hundred seventeen".