129601385 has 8 divisors (see below), whose sum is σ = 155582856. Its totient is φ = 103640320.

The previous prime is 129601379. The next prime is 129601399. The reversal of 129601385 is 583106921.

It can be written as a sum of positive squares in 4 ways, for example, as 5929 + 129595456 = 77^2 + 11384^2 .

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

It is not a de Polignac number, because 129601385 - 2⁶ = 129601321 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 21395 + ... + 26775.

It is an arithmetic number, because the mean of its divisors is an integer number (19447857).

Almost surely, 2^129601385 is an apocalyptic number.

It is an amenable number.

129601385 is a deficient number, since it is larger than the sum of its proper divisors (25981471).

129601385 is an equidigital number, since it uses as much as digits as its factorization.

129601385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 129601385 is about 11384.2604063681. The cubic root of 129601385 is about 506.0614018818.

The spelling of 129601385 in words is "one hundred twenty-nine million, six hundred one thousand, three hundred eighty-five".