129656134 has 8 divisors (see below), whose sum is σ = 194809608. Its totient is φ = 64719600.

The previous prime is 129656123. The next prime is 129656147. The reversal of 129656134 is 431656921.

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

It is a junction number, because it is equal to n+sod(n) for n = 129656093 and 129656102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52732 + ... + 55135.

It is an arithmetic number, because the mean of its divisors is an integer number (24351201).

Almost surely, 2^129656134 is an apocalyptic number.

129656134 is a deficient number, since it is larger than the sum of its proper divisors (65153474).

129656134 is a wasteful number, since it uses less digits than its factorization.

129656134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108470.

The product of its digits is 38880, while the sum is 37.

The square root of 129656134 is about 11386.6647443402. The cubic root of 129656134 is about 506.1326522911.

The spelling of 129656134 in words is "one hundred twenty-nine million, six hundred fifty-six thousand, one hundred thirty-four".