129142107 has 48 divisors (see below), whose sum is σ = 206693760. Its totient is φ = 80341632.

The previous prime is 129142103. The next prime is 129142141. The reversal of 129142107 is 701241921.

It is not a de Polignac number, because 129142107 - 2² = 129142103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (129142103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 383043 + ... + 383379.

It is an arithmetic number, because the mean of its divisors is an integer number (4306120).

Almost surely, 2^129142107 is an apocalyptic number.

129142107 is a deficient number, since it is larger than the sum of its proper divisors (77551653).

129142107 is an equidigital number, since it uses as much as digits as its factorization.

129142107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 129142107 is about 11364.0708815107. The cubic root of 129142107 is about 505.4629052898.

The spelling of 129142107 in words is "one hundred twenty-nine million, one hundred forty-two thousand, one hundred seven".