129743146 has 8 divisors (see below), whose sum is σ = 209585124. Its totient is φ = 59881440.

The previous prime is 129743137. The next prime is 129743177. The reversal of 129743146 is 641347921.

It can be written as a sum of positive squares in 2 ways, for example, as 90992521 + 38750625 = 9539^2 + 6225^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 2495035 + ... + 2495086.

Almost surely, 2^129743146 is an apocalyptic number.

129743146 is a deficient number, since it is larger than the sum of its proper divisors (79841978).

129743146 is a wasteful number, since it uses less digits than its factorization.

129743146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990136.

The product of its digits is 36288, while the sum is 37.

The square root of 129743146 is about 11390.4848887130. The cubic root of 129743146 is about 506.2458485459.

The spelling of 129743146 in words is "one hundred twenty-nine million, seven hundred forty-three thousand, one hundred forty-six".