129929542 has 4 divisors (see below), whose sum is σ = 194894316. Its totient is φ = 64964770.

The previous prime is 129929539. The next prime is 129929557. The reversal of 129929542 is 245929921.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32482384 + ... + 32482387.

It is an arithmetic number, because the mean of its divisors is an integer number (48723579).

Almost surely, 2^129929542 is an apocalyptic number.

129929542 is a deficient number, since it is larger than the sum of its proper divisors (64964774).

129929542 is an equidigital number, since it uses as much as digits as its factorization.

129929542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64964773.

The product of its digits is 116640, while the sum is 43.

The square root of 129929542 is about 11398.6640445273. The cubic root of 129929542 is about 506.4881659028.

The spelling of 129929542 in words is "one hundred twenty-nine million, nine hundred twenty-nine thousand, five hundred forty-two".