129015 has 24 divisors (see below), whose sum is σ = 232128. Its totient is φ = 66240.

The previous prime is 129011. The next prime is 129023. The reversal of 129015 is 510921.

It is not a de Polignac number, because 129015 - 2² = 129011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2085 + ... + 2145.

It is an arithmetic number, because the mean of its divisors is an integer number (9672).

2¹²⁹⁰¹⁵ is an apocalyptic number.

129015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129015 is a deficient number, since it is larger than the sum of its proper divisors (103113).

129015 is a wasteful number, since it uses less digits than its factorization.

129015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 129015 is about 359.1865810411. The cubic root of 129015 is about 50.5297018359.

Adding to 129015 its reverse (510921), we get a palindrome (639936).

The spelling of 129015 in words is "one hundred twenty-nine thousand, fifteen".