129258 has 24 divisors (see below), whose sum is σ = 288288. Its totient is φ = 41832.

The previous prime is 129229. The next prime is 129263. The reversal of 129258 is 852921.

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.

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 11 ways as a sum of consecutive naturals, for example, 691 + ... + 857.

It is an arithmetic number, because the mean of its divisors is an integer number (12012).

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.

129258 is an abundant number, since it is smaller than the sum of its proper divisors (159030).

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 sum of its prime factors is 218 (or 215 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

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".