129534281 has 4 divisors (see below), whose sum is σ = 129590292. Its totient is φ = 129478272.

The previous prime is 129534259. The next prime is 129534287. The reversal of 129534281 is 182435921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100320256 + 29214025 = 10016^2 + 5405^2 .

It is a cyclic number.

It is not a de Polignac number, because 129534281 - 2¹⁴ = 129517897 is a prime.

It is a super-2 number, since 2×129534281² = 33558259908373922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129534287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24380 + ... + 29213.

It is an arithmetic number, because the mean of its divisors is an integer number (32397573).

Almost surely, 2^129534281 is an apocalyptic number.

It is an amenable number.

129534281 is a deficient number, since it is larger than the sum of its proper divisors (56011).

129534281 is an equidigital number, since it uses as much as digits as its factorization.

129534281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56010.

The product of its digits is 17280, while the sum is 35.

The square root of 129534281 is about 11381.3127977400. The cubic root of 129534281 is about 505.9740452871.

The spelling of 129534281 in words is "one hundred twenty-nine million, five hundred thirty-four thousand, two hundred eighty-one".