129135046 has 8 divisors (see below), whose sum is σ = 194513760. Its totient is φ = 64297128.

The previous prime is 129134989. The next prime is 129135053. The reversal of 129135046 is 640531921.

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 = 129134999 and 129135017.

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, 134601 + ... + 135556.

It is an arithmetic number, because the mean of its divisors is an integer number (24314220).

Almost surely, 2^129135046 is an apocalyptic number.

129135046 is a deficient number, since it is larger than the sum of its proper divisors (65378714).

129135046 is a wasteful number, since it uses less digits than its factorization.

129135046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270398.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 129135046 is about 11363.7602051434. The cubic root of 129135046 is about 505.4536928579.

Adding to 129135046 its reverse (640531921), we get a palindrome (769666967).

The spelling of 129135046 in words is "one hundred twenty-nine million, one hundred thirty-five thousand, forty-six".