129683281 has 8 divisors (see below), whose sum is σ = 159610304. Its totient is φ = 102606480.

The previous prime is 129683243. The next prime is 129683297. The reversal of 129683281 is 182386921.

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

It is a cyclic number.

It is not a de Polignac number, because 129683281 - 2⁷ = 129683153 is a prime.

It is a super-2 number, since 2×129683281² = 33635506741849922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129683201) 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, 712455 + ... + 712636.

It is an arithmetic number, because the mean of its divisors is an integer number (19951288).

Almost surely, 2^129683281 is an apocalyptic number.

It is an amenable number.

129683281 is a deficient number, since it is larger than the sum of its proper divisors (29927023).

129683281 is a wasteful number, since it uses less digits than its factorization.

129683281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425111.

The product of its digits is 41472, while the sum is 40.

The square root of 129683281 is about 11387.8567342586. The cubic root of 129683281 is about 506.1679739887.

The spelling of 129683281 in words is "one hundred twenty-nine million, six hundred eighty-three thousand, two hundred eighty-one".