129936 has 20 divisors (see below), whose sum is σ = 335792. Its totient is φ = 43296.

The previous prime is 129919. The next prime is 129937. The reversal of 129936 is 639921.

It is not an unprimeable number, because it can be changed into a prime (129937) by changing a digit.

129936 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306 + ... + 1401.

2¹²⁹⁹³⁶ is an apocalyptic number.

129936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129936 is an abundant number, since it is smaller than the sum of its proper divisors (205856).

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

129936 is a wasteful number, since it uses less digits than its factorization.

129936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718 (or 2712 counting only the distinct ones).

The product of its digits is 2916, while the sum is 30.

The square root of 129936 is about 360.4663645890. The cubic root of 129936 is about 50.6496557236.

It can be divided in two parts, 1299 and 36, that multiplied together give a palindrome (46764).

The spelling of 129936 in words is "one hundred twenty-nine thousand, nine hundred thirty-six".