129115 has 24 divisors (see below), whose sum is σ = 196992. Its totient is φ = 80640.

The previous prime is 129113. The next prime is 129119. The reversal of 129115 is 511921.

It is not a de Polignac number, because 129115 - 2¹ = 129113 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 129092 and 129101.

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 23 ways as a sum of consecutive naturals, for example, 4150 + ... + 4180.

It is an arithmetic number, because the mean of its divisors is an integer number (8208).

2¹²⁹¹¹⁵ is an apocalyptic number.

129115 is a deficient number, since it is larger than the sum of its proper divisors (67877).

129115 is a wasteful number, since it uses less digits than its factorization.

129115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 60 counting only the distinct ones).

The product of its digits is 90, while the sum is 19.

The square root of 129115 is about 359.3257574959. The cubic root of 129115 is about 50.5427537167.

The spelling of 129115 in words is "one hundred twenty-nine thousand, one hundred fifteen".