129503 has 8 divisors (see below), whose sum is σ = 144336. Its totient is φ = 115200.

The previous prime is 129499. The next prime is 129509. The reversal of 129503 is 305921.

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 129503 - 2² = 129499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129509) 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, 575 + ... + 767.

It is an arithmetic number, because the mean of its divisors is an integer number (18042).

2¹²⁹⁵⁰³ is an apocalyptic number.

129503 is a deficient number, since it is larger than the sum of its proper divisors (14833).

129503 is a wasteful number, since it uses less digits than its factorization.

129503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 129503 is about 359.8652525599. The cubic root of 129503 is about 50.5933313088.

The spelling of 129503 in words is "one hundred twenty-nine thousand, five hundred three".