129543 has 8 divisors (see below), whose sum is σ = 178800. Its totient is φ = 83328.

The previous prime is 129539. The next prime is 129553. The reversal of 129543 is 345921.

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

It is not a de Polignac number, because 129543 - 2² = 129539 is a prime.

It is an Ulam number.

129543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129533) 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, 658 + ... + 831.

It is an arithmetic number, because the mean of its divisors is an integer number (22350).

2¹²⁹⁵⁴³ is an apocalyptic number.

129543 is a deficient number, since it is larger than the sum of its proper divisors (49257).

129543 is a wasteful number, since it uses less digits than its factorization.

129543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521.

The product of its digits is 1080, while the sum is 24.

The square root of 129543 is about 359.9208246268. The cubic root of 129543 is about 50.5985397465.

The spelling of 129543 in words is "one hundred twenty-nine thousand, five hundred forty-three".