129321142 has 24 divisors (see below), whose sum is σ = 211667904. Its totient is φ = 59202432.

The previous prime is 129321131. The next prime is 129321149. The reversal of 129321142 is 241123921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129321149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18363 + ... + 24409.

It is an arithmetic number, because the mean of its divisors is an integer number (8819496).

Almost surely, 2^129321142 is an apocalyptic number.

129321142 is a deficient number, since it is larger than the sum of its proper divisors (82346762).

129321142 is a wasteful number, since it uses less digits than its factorization.

129321142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120 (or 6103 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 129321142 is about 11371.9453920602. The cubic root of 129321142 is about 505.6963787512.

The spelling of 129321142 in words is "one hundred twenty-nine million, three hundred twenty-one thousand, one hundred forty-two".