129637505 has 16 divisors (see below), whose sum is σ = 163227648. Its totient is φ = 98712000.

The previous prime is 129637477. The next prime is 129637507. The reversal of 129637505 is 505736921.

It is a happy number.

It is not a de Polignac number, because 129637505 - 2⁶ = 129637441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129637507) 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 in 15 ways as a sum of consecutive naturals, for example, 2600 + ... + 16310.

It is an arithmetic number, because the mean of its divisors is an integer number (10201728).

Almost surely, 2^129637505 is an apocalyptic number.

It is an amenable number.

129637505 is a deficient number, since it is larger than the sum of its proper divisors (33590143).

129637505 is a wasteful number, since it uses less digits than its factorization.

129637505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13808.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 129637505 is about 11385.8466966669. The cubic root of 129637505 is about 506.1084107415.

The spelling of 129637505 in words is "one hundred twenty-nine million, six hundred thirty-seven thousand, five hundred five".