129142103 has 2 divisors, whose sum is σ = 129142104. Its totient is φ = 129142102.

The previous prime is 129142067. The next prime is 129142141. The reversal of 129142103 is 301241921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129142103 - 2¹⁰ = 129141079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129142003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64571051 + 64571052.

It is an arithmetic number, because the mean of its divisors is an integer number (64571052).

Almost surely, 2^129142103 is an apocalyptic number.

129142103 is a deficient number, since it is larger than the sum of its proper divisors (1).

129142103 is an equidigital number, since it uses as much as digits as its factorization.

129142103 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 129142103 is about 11364.0707055175. The cubic root of 129142103 is about 505.4629000712.

The spelling of 129142103 in words is "one hundred twenty-nine million, one hundred forty-two thousand, one hundred three".