117129 has 4 divisors (see below), whose sum is σ = 156176. Its totient is φ = 78084.

The previous prime is 117127. The next prime is 117133. The reversal of 117129 is 921711.

117129 = 72² + 73² + ... + 89².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 117129 - 2¹ = 117127 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19519 + ... + 19524.

It is an arithmetic number, because the mean of its divisors is an integer number (39044).

2¹¹⁷¹²⁹ is an apocalyptic number.

It is an amenable number.

117129 is a deficient number, since it is larger than the sum of its proper divisors (39047).

117129 is an equidigital number, since it uses as much as digits as its factorization.

117129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39046.

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

The square root of 117129 is about 342.2411430556. The cubic root of 117129 is about 48.9277012346.

It can be divided in two parts, 11 and 7129, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 117129 in words is "one hundred seventeen thousand, one hundred twenty-nine".