129725103 has 8 divisors (see below), whose sum is σ = 182070400. Its totient is φ = 81931608.

The previous prime is 129725087. The next prime is 129725131. The reversal of 129725103 is 301527921.

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

It is not a de Polignac number, because 129725103 - 2⁴ = 129725087 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 (129725003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137883 + ... + 1137996.

It is an arithmetic number, because the mean of its divisors is an integer number (22758800).

Almost surely, 2^129725103 is an apocalyptic number.

129725103 is a deficient number, since it is larger than the sum of its proper divisors (52345297).

129725103 is a wasteful number, since it uses less digits than its factorization.

129725103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275901.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 129725103 is about 11389.6928404589. The cubic root of 129725103 is about 506.2223800813. Note that the first 3 decimals are identical.

The spelling of 129725103 in words is "one hundred twenty-nine million, seven hundred twenty-five thousand, one hundred three".