129117 has 8 divisors (see below), whose sum is σ = 173824. Its totient is φ = 85248.

The previous prime is 129113. The next prime is 129119. The reversal of 129117 is 711921.

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

It is not a de Polignac number, because 129117 - 2² = 129113 is a prime.

It is a Duffinian number.

129117 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 129093 and 129102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129113) 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 7 ways as a sum of consecutive naturals, for example, 468 + ... + 690.

It is an arithmetic number, because the mean of its divisors is an integer number (21728).

2¹²⁹¹¹⁷ is an apocalyptic number.

It is an amenable number.

129117 is a deficient number, since it is larger than the sum of its proper divisors (44707).

129117 is a wasteful number, since it uses less digits than its factorization.

129117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419.

The product of its digits is 126, while the sum is 21.

The square root of 129117 is about 359.3285404751. The cubic root of 129117 is about 50.5430146856.

The spelling of 129117 in words is "one hundred twenty-nine thousand, one hundred seventeen".