129670 has 8 divisors (see below), whose sum is σ = 233424. Its totient is φ = 51864.

The previous prime is 129643. The next prime is 129671. The reversal of 129670 is 76921.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129671) by changing a digit.

129670 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6474 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (29178).

2¹²⁹⁶⁷⁰ is an apocalyptic number.

129670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129670 is a deficient number, since it is larger than the sum of its proper divisors (103754).

129670 is a wasteful number, since it uses less digits than its factorization.

129670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12974.

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

The square root of 129670 is about 360.0972090978. The cubic root of 129670 is about 50.6150694335.

The spelling of 129670 in words is "one hundred twenty-nine thousand, six hundred seventy".