129760 has 24 divisors (see below), whose sum is σ = 306936. Its totient is φ = 51840.

The previous prime is 129757. The next prime is 129763. The reversal of 129760 is 67921.

It is an interprime number because it is at equal distance from previous prime (129757) and next prime (129763).

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129763) 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, 246 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (12789).

2¹²⁹⁷⁶⁰ is an apocalyptic number.

129760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129760 is an abundant number, since it is smaller than the sum of its proper divisors (177176).

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

129760 is an equidigital number, since it uses as much as digits as its factorization.

129760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 129760 is about 360.2221536774. Note that the first 3 decimals coincide. The cubic root of 129760 is about 50.6267768517.

The spelling of 129760 in words is "one hundred twenty-nine thousand, seven hundred sixty".