129029 has 4 divisors (see below), whose sum is σ = 135840. Its totient is φ = 122220.

The previous prime is 129023. The next prime is 129037. The reversal of 129029 is 920921.

129029 is nontrivially palindromic in base 13.

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 a cyclic number.

It is not a de Polignac number, because 129029 - 2¹⁶ = 63493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128995 and 129013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129023) 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, 3377 + ... + 3414.

It is an arithmetic number, because the mean of its divisors is an integer number (33960).

2¹²⁹⁰²⁹ is an apocalyptic number.

129029 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129029 is a deficient number, since it is larger than the sum of its proper divisors (6811).

129029 is an equidigital number, since it uses as much as digits as its factorization.

129029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 129029 is about 359.2060689910. The cubic root of 129029 is about 50.5315295051.

The spelling of 129029 in words is "one hundred twenty-nine thousand, twenty-nine".