129806 has 8 divisors (see below), whose sum is σ = 199584. Its totient is φ = 63280.

The previous prime is 129803. The next prime is 129841. The reversal of 129806 is 608921.

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 (129803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710 + ... + 873.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2¹²⁹⁸⁰⁶ is an apocalyptic number.

129806 is a deficient number, since it is larger than the sum of its proper divisors (69778).

129806 is a wasteful number, since it uses less digits than its factorization.

129806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 129806 is about 360.2859975075. The cubic root of 129806 is about 50.6327585528.

The spelling of 129806 in words is "one hundred twenty-nine thousand, eight hundred six".