129103 has 4 divisors (see below), whose sum is σ = 139048. Its totient is φ = 119160.

The previous prime is 129097. The next prime is 129113. The reversal of 129103 is 301921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301921 = 23 ⋅13127.

It is a cyclic number.

It is not a de Polignac number, because 129103 - 2⁹ = 128591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129113) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4953 + ... + 4978.

It is an arithmetic number, because the mean of its divisors is an integer number (34762).

2¹²⁹¹⁰³ is an apocalyptic number.

129103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

129103 is a deficient number, since it is larger than the sum of its proper divisors (9945).

129103 is an equidigital number, since it uses as much as digits as its factorization.

129103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9944.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 129103 is about 359.3090591677. The cubic root of 129103 is about 50.5411878469.

It can be divided in two parts, 129 and 103, that added together give a palindrome (232).

The spelling of 129103 in words is "one hundred twenty-nine thousand, one hundred three".