7222129 has 2 divisors, whose sum is σ = 7222130. Its totient is φ = 7222128.

The previous prime is 7222123. The next prime is 7222133. The reversal of 7222129 is 9212227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4613904 + 2608225 = 2148^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 7222129 - 2³ = 7222121 is a prime.

It is not a weakly prime, because it can be changed into another prime (7222121) 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, 3611064 + 3611065.

It is an arithmetic number, because the mean of its divisors is an integer number (3611065).

Almost surely, 2^7222129 is an apocalyptic number.

It is an amenable number.

7222129 is a deficient number, since it is larger than the sum of its proper divisors (1).

7222129 is an equidigital number, since it uses as much as digits as its factorization.

7222129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 7222129 is about 2687.4019051865. The cubic root of 7222129 is about 193.2955015815.

It can be divided in two parts, 72 and 22129, that added together give a square (22201 = 149²).

The spelling of 7222129 in words is "seven million, two hundred twenty-two thousand, one hundred twenty-nine".