129548081 has 8 divisors (see below), whose sum is σ = 139612200. Its totient is φ = 119498112.

The previous prime is 129548033. The next prime is 129548093. The reversal of 129548081 is 180845921.

It can be written as a sum of positive squares in 4 ways, for example, as 43681 + 129504400 = 209^2 + 11380^2 .

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 129548081 - 2¹⁴ = 129531697 is a prime.

It is a super-2 number, since 2×129548081² = 33565410581565122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129548681) 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, 22781 + ... + 27893.

It is an arithmetic number, because the mean of its divisors is an integer number (17451525).

Almost surely, 2^129548081 is an apocalyptic number.

It is an amenable number.

129548081 is a deficient number, since it is larger than the sum of its proper divisors (10064119).

129548081 is a wasteful number, since it uses less digits than its factorization.

129548081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7075.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 129548081 is about 11381.9190385453. The cubic root of 129548081 is about 505.9920127159.

The spelling of 129548081 in words is "one hundred twenty-nine million, five hundred forty-eight thousand, eighty-one".