It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 13.
It is an unprimeable number.
129258 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2129258 is an apocalyptic number.
129258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
129258 is a wasteful number, since it uses less digits than its factorization.
129258 is an odious number, because the sum of its binary digits is odd.
The square root of 129258 is about 359.5246862178. The cubic root of 129258 is about 50.5614062025.
The spelling of 129258 in words is "one hundred twenty-nine thousand, two hundred fifty-eight".