129930 has 32 divisors (see below), whose sum is σ = 321408. Its totient is φ = 33600.

The previous prime is 129919. The next prime is 129937. The reversal of 129930 is 39921.

It is a happy number.

129930 is nontrivially palindromic in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 129930.

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

129930 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 1795 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (10044).

2¹²⁹⁹³⁰ is an apocalyptic number.

129930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160704).

129930 is an abundant number, since it is smaller than the sum of its proper divisors (191478).

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

129930 is a wasteful number, since it uses less digits than its factorization.

129930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 129930 is about 360.4580419411. The cubic root of 129930 is about 50.6488761024.

Subtracting from 129930 its reverse (39921), we obtain a palindrome (90009).

The spelling of 129930 in words is "one hundred twenty-nine thousand, nine hundred thirty".