129730185 has 48 divisors (see below), whose sum is σ = 243542208. Its totient is φ = 63504000.

The previous prime is 129730171. The next prime is 129730201. The reversal of 129730185 is 581037921.

It is not a de Polignac number, because 129730185 - 2⁴ = 129730169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122910 + ... + 123960.

It is an arithmetic number, because the mean of its divisors is an integer number (5073796).

Almost surely, 2^129730185 is an apocalyptic number.

129730185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129730185 is a deficient number, since it is larger than the sum of its proper divisors (113812023).

129730185 is a wasteful number, since it uses less digits than its factorization.

129730185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 129730185 is about 11389.9159347205. The cubic root of 129730185 is about 506.2289904404.

The spelling of 129730185 in words is "one hundred twenty-nine million, seven hundred thirty thousand, one hundred eighty-five".