129932785 has 8 divisors (see below), whose sum is σ = 165091176. Its totient is φ = 97831680.

The previous prime is 129932779. The next prime is 129932821. The reversal of 129932785 is 587239921.

It can be written as a sum of positive squares in 4 ways, for example, as 32160241 + 97772544 = 5671^2 + 9888^2 .

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

It is not a de Polignac number, because 129932785 - 2⁵ = 129932753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 764226 + ... + 764395.

It is an arithmetic number, because the mean of its divisors is an integer number (20636397).

Almost surely, 2^129932785 is an apocalyptic number.

It is an amenable number.

129932785 is a deficient number, since it is larger than the sum of its proper divisors (35158391).

129932785 is a wasteful number, since it uses less digits than its factorization.

129932785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528643.

The product of its digits is 272160, while the sum is 46.

The square root of 129932785 is about 11398.8062971523. The cubic root of 129932785 is about 506.4923797955.

The spelling of 129932785 in words is "one hundred twenty-nine million, nine hundred thirty-two thousand, seven hundred eighty-five".