129418681 has 8 divisors (see below), whose sum is σ = 148001024. Its totient is φ = 110859840.

The previous prime is 129418657. The next prime is 129418693. The reversal of 129418681 is 186814921.

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

It is not a de Polignac number, because 129418681 - 2⁵ = 129418649 is a prime.

It is a super-3 number, since 3×129418681³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129418621) by changing a digit.

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, 8176 + ... + 18046.

It is an arithmetic number, because the mean of its divisors is an integer number (18500128).

Almost surely, 2^129418681 is an apocalyptic number.

It is an amenable number.

129418681 is a deficient number, since it is larger than the sum of its proper divisors (18582343).

129418681 is an equidigital number, since it uses as much as digits as its factorization.

129418681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11751.

The product of its digits is 27648, while the sum is 40.

The square root of 129418681 is about 11376.2331639256. The cubic root of 129418681 is about 505.8234853804.

The spelling of 129418681 in words is "one hundred twenty-nine million, four hundred eighteen thousand, six hundred eighty-one".