129412068 has 12 divisors (see below), whose sum is σ = 301961520. Its totient is φ = 43137352.

The previous prime is 129412067. The next prime is 129412121. The reversal of 129412068 is 860214921.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (129412067) 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 3 ways as a sum of consecutive naturals, for example, 5392158 + ... + 5392181.

It is an arithmetic number, because the mean of its divisors is an integer number (25163460).

Almost surely, 2^129412068 is an apocalyptic number.

It is an amenable number.

129412068 is an abundant number, since it is smaller than the sum of its proper divisors (172549452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129412068 is a wasteful number, since it uses less digits than its factorization.

129412068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10784346 (or 10784344 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 129412068 is about 11375.9425104033. The cubic root of 129412068 is about 505.8148697574.

Adding to 129412068 its reverse (860214921), we get a palindrome (989626989).

The spelling of 129412068 in words is "one hundred twenty-nine million, four hundred twelve thousand, sixty-eight".