129886 has 8 divisors (see below), whose sum is σ = 197064. Its totient is φ = 64200.

The previous prime is 129853. The next prime is 129887. The reversal of 129886 is 688921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129887) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 120 + ... + 523.

It is an arithmetic number, because the mean of its divisors is an integer number (24633).

2¹²⁹⁸⁸⁶ is an apocalyptic number.

129886 is a deficient number, since it is larger than the sum of its proper divisors (67178).

129886 is a wasteful number, since it uses less digits than its factorization.

129886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746.

The product of its digits is 6912, while the sum is 34.

The square root of 129886 is about 360.3970033172. The cubic root of 129886 is about 50.6431581461.

It can be divided in two parts, 1298 and 86, that multiplied together give a triangular number (111628 = T₄₇₂).

The spelling of 129886 in words is "one hundred twenty-nine thousand, eight hundred eighty-six".