129455 has 8 divisors (see below), whose sum is σ = 164592. Its totient is φ = 97408.

The previous prime is 129449. The next prime is 129457. The reversal of 129455 is 554921.

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 129455 - 2⁴ = 129439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677 + ... + 846.

It is an arithmetic number, because the mean of its divisors is an integer number (20574).

2¹²⁹⁴⁵⁵ is an apocalyptic number.

129455 is a deficient number, since it is larger than the sum of its proper divisors (35137).

129455 is a wasteful number, since it uses less digits than its factorization.

129455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its digits is 1800, while the sum is 26.

The square root of 129455 is about 359.7985547497. The cubic root of 129455 is about 50.5870797677.

The spelling of 129455 in words is "one hundred twenty-nine thousand, four hundred fifty-five".