129605065 has 8 divisors (see below), whose sum is σ = 155674440. Its totient is φ = 103585152.

The previous prime is 129605057. The next prime is 129605101. The reversal of 129605065 is 560506921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1937664 + 127667401 = 1392^2 + 11299^2 .

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 129605065 - 2³ = 129605057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129605065.

It is an unprimeable number.

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, 6330 + ... + 17299.

It is an arithmetic number, because the mean of its divisors is an integer number (19459305).

Almost surely, 2^129605065 is an apocalyptic number.

It is an amenable number.

129605065 is a deficient number, since it is larger than the sum of its proper divisors (26069375).

129605065 is a wasteful number, since it uses less digits than its factorization.

129605065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24731.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 129605065 is about 11384.4220318820. The cubic root of 129605065 is about 506.0661916668.

The spelling of 129605065 in words is "one hundred twenty-nine million, six hundred five thousand, sixty-five".