1312042129 has 2 divisors, whose sum is σ = 1312042130. Its totient is φ = 1312042128.

The previous prime is 1312042111. The next prime is 1312042139. The reversal of 1312042129 is 9212402131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1188387729 + 123654400 = 34473^2 + 11120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312042129 - 2⁷ = 1312042001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312042139) 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, 656021064 + 656021065.

It is an arithmetic number, because the mean of its divisors is an integer number (656021065).

Almost surely, 2^1312042129 is an apocalyptic number.

It is an amenable number.

1312042129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312042129 is an equidigital number, since it uses as much as digits as its factorization.

1312042129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1312042129 is about 36222.1220941016. The cubic root of 1312042129 is about 1094.7524523984.

The spelling of 1312042129 in words is "one billion, three hundred twelve million, forty-two thousand, one hundred twenty-nine".