129660 has 24 divisors (see below), whose sum is σ = 363216. Its totient is φ = 34560.

The previous prime is 129643. The next prime is 129671. The reversal of 129660 is 66921.

129660 = 116² + 117² + ... + 124².

It is a self number, because there is not a number n which added to its sum of digits gives 129660.

It is a congruent number.

It is an unprimeable number.

129660 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 7 ways as a sum of consecutive naturals, for example, 1021 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (15134).

2¹²⁹⁶⁶⁰ is an apocalyptic number.

129660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129660 is an abundant number, since it is smaller than the sum of its proper divisors (233556).

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

129660 is a wasteful number, since it uses less digits than its factorization.

129660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173 (or 2171 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 129660 is about 360.0833236905. The cubic root of 129660 is about 50.6137682750.

The spelling of 129660 in words is "one hundred twenty-nine thousand, six hundred sixty".