129134081 has 2 divisors, whose sum is σ = 129134082. Its totient is φ = 129134080.

The previous prime is 129134069. The next prime is 129134099. The reversal of 129134081 is 180431921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109411600 + 19722481 = 10460^2 + 4441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129134081 is a prime.

It is a super-2 number, since 2×129134081² = 33351221751429122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (129134021) 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 as a sum of consecutive naturals, namely, 64567040 + 64567041.

It is an arithmetic number, because the mean of its divisors is an integer number (64567041).

Almost surely, 2^129134081 is an apocalyptic number.

It is an amenable number.

129134081 is a deficient number, since it is larger than the sum of its proper divisors (1).

129134081 is an equidigital number, since it uses as much as digits as its factorization.

129134081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 129134081 is about 11363.7177455268. The cubic root of 129134081 is about 505.4524338038.

The spelling of 129134081 in words is "one hundred twenty-nine million, one hundred thirty-four thousand, eighty-one".