129049601 has 8 divisors (see below), whose sum is σ = 136820520. Its totient is φ = 121298688.

The previous prime is 129049553. The next prime is 129049603. The reversal of 129049601 is 106940921.

It is a Cunningham number, because it is equal to 11360²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 17007376 + 112042225 = 4124^2 + 10585^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129049601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129049603) 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, 9515 + ... + 18671.

It is an arithmetic number, because the mean of its divisors is an integer number (17102565).

Almost surely, 2^129049601 is an apocalyptic number.

It is an amenable number.

129049601 is a deficient number, since it is larger than the sum of its proper divisors (7770919).

129049601 is an equidigital number, since it uses as much as digits as its factorization.

129049601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 129049601 is about 11360.0000440141. Note that the first 4 decimals coincide. The cubic root of 129049601 is about 505.3421867998.

The spelling of 129049601 in words is "one hundred twenty-nine million, forty-nine thousand, six hundred one".