1222129 has 2 divisors, whose sum is σ = 1222130. Its totient is φ = 1222128.

The previous prime is 1222097. The next prime is 1222157. The reversal of 1222129 is 9212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 23104 = 1095^2 + 152^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222129 - 2⁵ = 1222097 is a prime.

It is a Chen prime.

1222129 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1222159) 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 as a sum of consecutive naturals, namely, 611064 + 611065.

It is an arithmetic number, because the mean of its divisors is an integer number (611065).

2^1222129 is an apocalyptic number.

It is an amenable number.

1222129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222129 is an equidigital number, since it uses as much as digits as its factorization.

1222129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 1222129 is about 1105.4994346448. The cubic root of 1222129 is about 106.9150926264.

It can be divided in two parts, 122212 and 9, that added together give a palindrome (122221).

The spelling of 1222129 in words is "one million, two hundred twenty-two thousand, one hundred twenty-nine".