129603 has 4 divisors (see below), whose sum is σ = 172808. Its totient is φ = 86400.

The previous prime is 129593. The next prime is 129607. The reversal of 129603 is 306921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 129603 - 2⁴ = 129587 is a prime.

It is a D-number.

It is a Duffinian number.

129603 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 129603.

It is not an unprimeable number, because it can be changed into a prime (129607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21598 + ... + 21603.

It is an arithmetic number, because the mean of its divisors is an integer number (43202).

129603 is a Friedman number, since it can be written as 90^2*16+3, using all its digits and the basic arithmetic operations.

2¹²⁹⁶⁰³ is an apocalyptic number.

129603 is a deficient number, since it is larger than the sum of its proper divisors (43205).

129603 is an equidigital number, since it uses as much as digits as its factorization.

129603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43204.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 129603 is about 360.0041666426. The cubic root of 129603 is about 50.6063503932.

The spelling of 129603 in words is "one hundred twenty-nine thousand, six hundred three".