129489 has 8 divisors (see below), whose sum is σ = 182880. Its totient is φ = 81216.

The previous prime is 129469. The next prime is 129491. The reversal of 129489 is 984921.

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

It is not a de Polignac number, because 129489 - 2⁵ = 129457 is a prime.

It is a super-2 number, since 2×129489² = 33534802242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129419) 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 7 ways as a sum of consecutive naturals, for example, 1219 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (22860).

2¹²⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

129489 is a deficient number, since it is larger than the sum of its proper divisors (53391).

129489 is a wasteful number, since it uses less digits than its factorization.

129489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559.

The product of its digits is 5184, while the sum is 33.

The square root of 129489 is about 359.8458003090. The cubic root of 129489 is about 50.5915081022.

The spelling of 129489 in words is "one hundred twenty-nine thousand, four hundred eighty-nine".