12142129 has 2 divisors, whose sum is σ = 12142130. Its totient is φ = 12142128.

The previous prime is 12142103. The next prime is 12142139. The reversal of 12142129 is 92124121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7011904 + 5130225 = 2648^2 + 2265^2 .

It is an emirp because it is prime and its reverse (92124121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12142129 - 2⁷ = 12142001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12142139) 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, 6071064 + 6071065.

It is an arithmetic number, because the mean of its divisors is an integer number (6071065).

Almost surely, 2^12142129 is an apocalyptic number.

It is an amenable number.

12142129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12142129 is an equidigital number, since it uses as much as digits as its factorization.

12142129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 22.

The square root of 12142129 is about 3484.5557823057. Note that the first 3 decimals coincide. The cubic root of 12142129 is about 229.8431760187.

The spelling of 12142129 in words is "twelve million, one hundred forty-two thousand, one hundred twenty-nine".