129380 has 12 divisors (see below), whose sum is σ = 271740. Its totient is φ = 51744.

The previous prime is 129379. The next prime is 129401. The reversal of 129380 is 83921.

It can be written as a sum of positive squares in 2 ways, for example, as 23104 + 106276 = 152^2 + 326^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3215 + ... + 3254.

It is an arithmetic number, because the mean of its divisors is an integer number (22645).

2¹²⁹³⁸⁰ is an apocalyptic number.

129380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129380 is an abundant number, since it is smaller than the sum of its proper divisors (142360).

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

129380 is a wasteful number, since it uses less digits than its factorization.

129380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478 (or 6476 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 129380 is about 359.6943146618. The cubic root of 129380 is about 50.5773086402.

The spelling of 129380 in words is "one hundred twenty-nine thousand, three hundred eighty".