129706 has 4 divisors (see below), whose sum is σ = 194562. Its totient is φ = 64852.

The previous prime is 129671. The next prime is 129707. The reversal of 129706 is 607921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 95481 + 34225 = 309^2 + 185^2 .

It is not an unprimeable number, because it can be changed into a prime (129707) by changing a digit.

129706 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32425 + ... + 32428.

2¹²⁹⁷⁰⁶ is an apocalyptic number.

129706 is a deficient number, since it is larger than the sum of its proper divisors (64856).

129706 is an equidigital number, since it uses as much as digits as its factorization.

129706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64855.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 129706 is about 360.1471921312. The cubic root of 129706 is about 50.6197530507.

The spelling of 129706 in words is "one hundred twenty-nine thousand, seven hundred six".