129049142 has 8 divisors (see below), whose sum is σ = 204960456. Its totient is φ = 60728992.

The previous prime is 129049111. The next prime is 129049163. The reversal of 129049142 is 241940921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 129049099 and 129049108.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1897748 + ... + 1897815.

It is an arithmetic number, because the mean of its divisors is an integer number (25620057).

Almost surely, 2^129049142 is an apocalyptic number.

129049142 is a deficient number, since it is larger than the sum of its proper divisors (75911314).

129049142 is a wasteful number, since it uses less digits than its factorization.

129049142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795582.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 129049142 is about 11359.9798415314. The cubic root of 129049142 is about 505.3415876701.

The spelling of 129049142 in words is "one hundred twenty-nine million, forty-nine thousand, one hundred forty-two".