129055730 has 8 divisors (see below), whose sum is σ = 232300332. Its totient is φ = 51622288.

The previous prime is 129055723. The next prime is 129055747. The reversal of 129055730 is 37550921.

It can be written as a sum of positive squares in 2 ways, for example, as 126270169 + 2785561 = 11237^2 + 1669^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6452777 + ... + 6452796.

Almost surely, 2^129055730 is an apocalyptic number.

129055730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129055730 is a deficient number, since it is larger than the sum of its proper divisors (103244602).

129055730 is a wasteful number, since it uses less digits than its factorization.

129055730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905580.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 129055730 is about 11360.2698031341. The cubic root of 129055730 is about 505.3501868070.

The spelling of 129055730 in words is "one hundred twenty-nine million, fifty-five thousand, seven hundred thirty".