2142229 has 2 divisors, whose sum is σ = 2142230. Its totient is φ = 2142228.

The previous prime is 2142227. The next prime is 2142241. The reversal of 2142229 is 9222412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1385329 + 756900 = 1177^2 + 870^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142229 - 2¹ = 2142227 is a prime.

Together with 2142227, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071114 + 1071115.

It is an arithmetic number, because the mean of its divisors is an integer number (1071115).

2^2142229 is an apocalyptic number.

It is an amenable number.

2142229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142229 is an equidigital number, since it uses as much as digits as its factorization.

2142229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 2142229 is about 1463.6355420664. The cubic root of 2142229 is about 128.9106004788.

The spelling of 2142229 in words is "two million, one hundred forty-two thousand, two hundred twenty-nine".