129243 has 8 divisors (see below), whose sum is σ = 175168. Its totient is φ = 84744.

The previous prime is 129229. The next prime is 129263. The reversal of 129243 is 342921.

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

It is not a de Polignac number, because 129243 - 2⁸ = 128987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 522.

It is an arithmetic number, because the mean of its divisors is an integer number (21896).

2¹²⁹²⁴³ is an apocalyptic number.

129243 is a deficient number, since it is larger than the sum of its proper divisors (45925).

129243 is an equidigital number, since it uses as much as digits as its factorization.

129243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713.

The product of its digits is 432, while the sum is 21.

The square root of 129243 is about 359.5038247363. The cubic root of 129243 is about 50.5594502941.

The spelling of 129243 in words is "one hundred twenty-nine thousand, two hundred forty-three".