1220017 has 4 divisors (see below), whose sum is σ = 1234800. Its totient is φ = 1205236.

The previous prime is 1219991. The next prime is 1220027. The reversal of 1220017 is 7100221.

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 a de Polignac number, because none of the positive numbers 2^k-1220017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1219979 and 1220006.

It is not an unprimeable number, because it can be changed into a prime (1220027) 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, 7267 + ... + 7432.

It is an arithmetic number, because the mean of its divisors is an integer number (308700).

2^1220017 is an apocalyptic number.

It is an amenable number.

1220017 is a deficient number, since it is larger than the sum of its proper divisors (14783).

1220017 is an equidigital number, since it uses as much as digits as its factorization.

1220017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14782.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 1220017 is about 1104.5437972303. The cubic root of 1220017 is about 106.8534693242.

Adding to 1220017 its reverse (7100221), we get a palindrome (8320238).

The spelling of 1220017 in words is "one million, two hundred twenty thousand, seventeen".