129738 has 16 divisors (see below), whose sum is σ = 296640. Its totient is φ = 37056.

The previous prime is 129737. The next prime is 129749. The reversal of 129738 is 837921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1503 + ... + 1586.

It is an arithmetic number, because the mean of its divisors is an integer number (18540).

2¹²⁹⁷³⁸ is an apocalyptic number.

129738 is an abundant number, since it is smaller than the sum of its proper divisors (166902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129738 is a wasteful number, since it uses less digits than its factorization.

129738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101.

The product of its digits is 3024, while the sum is 30.

The square root of 129738 is about 360.1916156714. The cubic root of 129738 is about 50.6239155384.

The spelling of 129738 in words is "one hundred twenty-nine thousand, seven hundred thirty-eight".