129042113 has 2 divisors, whose sum is σ = 129042114. Its totient is φ = 129042112.

The previous prime is 129042103. The next prime is 129042139. The reversal of 129042113 is 311240921.

129042113 = 8032² + 8033².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64529089 + 64513024 = 8033^2 + 8032^2 .

It is a cyclic number.

It is not a de Polignac number, because 129042113 - 2⁶ = 129042049 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (129042103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64521056 + 64521057.

It is an arithmetic number, because the mean of its divisors is an integer number (64521057).

Almost surely, 2^129042113 is an apocalyptic number.

129042113 is the 8033-rd centered square number.

It is an amenable number.

129042113 is a deficient number, since it is larger than the sum of its proper divisors (1).

129042113 is an equidigital number, since it uses as much as digits as its factorization.

129042113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 129042113 is about 11359.6704617696. The cubic root of 129042113 is about 505.3324125852.

The spelling of 129042113 in words is "one hundred twenty-nine million, forty-two thousand, one hundred thirteen".