129387 has 16 divisors (see below), whose sum is σ = 190080. Its totient is φ = 77952.

The previous prime is 129379. The next prime is 129401. The reversal of 129387 is 783921.

It is a happy number.

It is not a de Polignac number, because 129387 - 2³ = 129379 is a prime.

129387 is a modest number, since divided by 387 gives 129 as remainder.

It is not an unprimeable number, because it can be changed into a prime (129347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2164 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (11880).

2¹²⁹³⁸⁷ is an apocalyptic number.

129387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129387 is a deficient number, since it is larger than the sum of its proper divisors (60693).

129387 is a wasteful number, since it uses less digits than its factorization.

129387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122.

The product of its digits is 3024, while the sum is 30.

The square root of 129387 is about 359.7040450148. The cubic root of 129387 is about 50.5782207719.

The spelling of 129387 in words is "one hundred twenty-nine thousand, three hundred eighty-seven".