129055 has 8 divisors (see below), whose sum is σ = 158112. Its totient is φ = 101088.

The previous prime is 129049. The next prime is 129061. The reversal of 129055 is 550921.

It is an interprime number because it is at equal distance from previous prime (129049) and next prime (129061).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129055 - 2⁵ = 129023 is a prime.

It is a Duffinian number.

129055 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22 + ... + 508.

It is an arithmetic number, because the mean of its divisors is an integer number (19764).

2¹²⁹⁰⁵⁵ is an apocalyptic number.

129055 is a deficient number, since it is larger than the sum of its proper divisors (29057).

129055 is an equidigital number, since it uses as much as digits as its factorization.

129055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 129055 is about 359.2422580933. The cubic root of 129055 is about 50.5349233972.

Adding to 129055 its reverse (550921), we get a palindrome (679976).

The spelling of 129055 in words is "one hundred twenty-nine thousand, fifty-five".