129523 has 8 divisors (see below), whose sum is σ = 144720. Its totient is φ = 115200.

The previous prime is 129517. The next prime is 129527. The reversal of 129523 is 325921.

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

It is a cyclic number.

It is not a de Polignac number, because 129523 - 2⁵ = 129491 is a prime.

It is a super-3 number, since 3×129523³ = 6518714183336001, which contains 333 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 129494 and 129503.

It is not an unprimeable number, because it can be changed into a prime (129527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123 + ... + 523.

It is an arithmetic number, because the mean of its divisors is an integer number (18090).

2¹²⁹⁵²³ is an apocalyptic number.

129523 is a deficient number, since it is larger than the sum of its proper divisors (15197).

129523 is a wasteful number, since it uses less digits than its factorization.

129523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its digits is 540, while the sum is 22.

The square root of 129523 is about 359.8930396660. The cubic root of 129523 is about 50.5959356617.

The spelling of 129523 in words is "one hundred twenty-nine thousand, five hundred twenty-three".