129142141 has 2 divisors, whose sum is σ = 129142142. Its totient is φ = 129142140.

The previous prime is 129142103. The next prime is 129142151. The reversal of 129142141 is 141241921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128936025 + 206116 = 11355^2 + 454^2 .

It is a cyclic number.

It is not a de Polignac number, because 129142141 - 2²¹ = 127044989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129142151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64571070 + 64571071.

It is an arithmetic number, because the mean of its divisors is an integer number (64571071).

Almost surely, 2^129142141 is an apocalyptic number.

It is an amenable number.

129142141 is a deficient number, since it is larger than the sum of its proper divisors (1).

129142141 is an equidigital number, since it uses as much as digits as its factorization.

129142141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 25.

The square root of 129142141 is about 11364.0723774534. The cubic root of 129142141 is about 505.4629496486.

The spelling of 129142141 in words is "one hundred twenty-nine million, one hundred forty-two thousand, one hundred forty-one".