1222271 has 2 divisors, whose sum is σ = 1222272. Its totient is φ = 1222270.

The previous prime is 1222267. The next prime is 1222279. The reversal of 1222271 is 1722221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222271 - 2² = 1222267 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222279) 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 as a sum of consecutive naturals, namely, 611135 + 611136.

It is an arithmetic number, because the mean of its divisors is an integer number (611136).

2^1222271 is an apocalyptic number.

1222271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222271 is an equidigital number, since it uses as much as digits as its factorization.

1222271 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1222271 is about 1105.5636571451. The cubic root of 1222271 is about 106.9192333118.

Adding to 1222271 its reverse (1722221), we get a palindrome (2944492).

The spelling of 1222271 in words is "one million, two hundred twenty-two thousand, two hundred seventy-one".