129759481 has 8 divisors (see below), whose sum is σ = 134166600. Its totient is φ = 125399808.

The previous prime is 129759437. The next prime is 129759517. The reversal of 129759481 is 184957921.

It can be written as a sum of positive squares in 4 ways, for example, as 12362256 + 117397225 = 3516^2 + 10835^2 .

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

It is not a de Polignac number, because 129759481 - 2⁹ = 129758969 is a prime.

It is a super-2 number, since 2×129759481² = 33675045818778722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129759781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6256 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (16770825).

Almost surely, 2^129759481 is an apocalyptic number.

It is an amenable number.

129759481 is a deficient number, since it is larger than the sum of its proper divisors (4407119).

129759481 is a wasteful number, since it uses less digits than its factorization.

129759481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23723.

The product of its digits is 181440, while the sum is 46.

The square root of 129759481 is about 11391.2019120021. The cubic root of 129759481 is about 506.2670935447.

The spelling of 129759481 in words is "one hundred twenty-nine million, seven hundred fifty-nine thousand, four hundred eighty-one".