129638075 has 36 divisors (see below), whose sum is σ = 189097272. Its totient is φ = 87897600.

The previous prime is 129638059. The next prime is 129638081. The reversal of 129638075 is 570836921.

It is not a de Polignac number, because 129638075 - 2⁴ = 129638059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 118280 + ... + 119370.

It is an arithmetic number, because the mean of its divisors is an integer number (5252702).

Almost surely, 2^129638075 is an apocalyptic number.

129638075 is a deficient number, since it is larger than the sum of its proper divisors (59459197).

129638075 is a wasteful number, since it uses less digits than its factorization.

129638075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1200 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 129638075 is about 11385.8717277159. The cubic root of 129638075 is about 506.1091525057.

The spelling of 129638075 in words is "one hundred twenty-nine million, six hundred thirty-eight thousand, seventy-five".