129538 has 8 divisors (see below), whose sum is σ = 195840. Its totient is φ = 64260.

The previous prime is 129533. The next prime is 129539. The reversal of 129538 is 835921.

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

It is not an unprimeable number, because it can be changed into a prime (129533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (24480).

2¹²⁹⁵³⁸ is an apocalyptic number.

129538 is a deficient number, since it is larger than the sum of its proper divisors (66302).

129538 is a wasteful number, since it uses less digits than its factorization.

129538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 2160, while the sum is 28.

The square root of 129538 is about 359.9138785876. The cubic root of 129538 is about 50.5978887505.

The spelling of 129538 in words is "one hundred twenty-nine thousand, five hundred thirty-eight".