1222171 has 2 divisors, whose sum is σ = 1222172. Its totient is φ = 1222170.

The previous prime is 1222159. The next prime is 1222187. The reversal of 1222171 is 1712221.

It is an a-pointer prime, because the next prime (1222187) can be obtained adding 1222171 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222171 - 2⁹ = 1221659 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611085 + 611086.

It is an arithmetic number, because the mean of its divisors is an integer number (611086).

2^1222171 is an apocalyptic number.

1222171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222171 is an equidigital number, since it uses as much as digits as its factorization.

1222171 is an evil number, because the sum of its binary digits is even.

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

The square root of 1222171 is about 1105.5184304208. The cubic root of 1222171 is about 106.9163173696.

Adding to 1222171 its reverse (1712221), we get a palindrome (2934392).

The spelling of 1222171 in words is "one million, two hundred twenty-two thousand, one hundred seventy-one".