129116 has 18 divisors (see below), whose sum is σ = 245952. Its totient is φ = 59280.

The previous prime is 129113. The next prime is 129119. The reversal of 129116 is 611921.

It is an interprime number because it is at equal distance from previous prime (129113) and next prime (129119).

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581 + ... + 771.

It is an arithmetic number, because the mean of its divisors is an integer number (13664).

2¹²⁹¹¹⁶ is an apocalyptic number.

It is an amenable number.

129116 is a deficient number, since it is larger than the sum of its proper divisors (116836).

129116 is a wasteful number, since it uses less digits than its factorization.

129116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 206 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

The square root of 129116 is about 359.3271489882. The cubic root of 129116 is about 50.5428842015.

The spelling of 129116 in words is "one hundred twenty-nine thousand, one hundred sixteen".