129786 has 16 divisors (see below), whose sum is σ = 263424. Its totient is φ = 42624.

The previous prime is 129769. The next prime is 129793. The reversal of 129786 is 687921.

129786 is nontrivially palindromic in base 12.

It is an unprimeable number.

129786 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (16464).

2¹²⁹⁷⁸⁶ is an apocalyptic number.

129786 is an abundant number, since it is smaller than the sum of its proper divisors (133638).

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

129786 is a wasteful number, since it uses less digits than its factorization.

129786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325.

The product of its digits is 6048, while the sum is 33.

The square root of 129786 is about 360.2582407107. The cubic root of 129786 is about 50.6301579869.

The spelling of 129786 in words is "one hundred twenty-nine thousand, seven hundred eighty-six".