129742706 has 8 divisors (see below), whose sum is σ = 195623004. Its totient is φ = 64535040.

The previous prime is 129742703. The next prime is 129742709. The reversal of 129742706 is 607247921.

It is an interprime number because it is at equal distance from previous prime (129742703) and next prime (129742709).

It can be written as a sum of positive squares in 2 ways, for example, as 128029225 + 1713481 = 11315^2 + 1309^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 129742706.

It is not an unprimeable number, because it can be changed into a prime (129742703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167675 + ... + 168446.

Almost surely, 2^129742706 is an apocalyptic number.

129742706 is a deficient number, since it is larger than the sum of its proper divisors (65880298).

129742706 is a wasteful number, since it uses less digits than its factorization.

129742706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336316.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 129742706 is about 11390.4655743301. The cubic root of 129742706 is about 506.2452762654.

The spelling of 129742706 in words is "one hundred twenty-nine million, seven hundred forty-two thousand, seven hundred six".