129141786 has 8 divisors (see below), whose sum is σ = 258283584. Its totient is φ = 43047260.

The previous prime is 129141773. The next prime is 129141811. The reversal of 129141786 is 687141921.

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

129141786 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10761810 + ... + 10761821.

It is an arithmetic number, because the mean of its divisors is an integer number (32285448).

Almost surely, 2^129141786 is an apocalyptic number.

129141786 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129141786 is a wasteful number, since it uses less digits than its factorization.

129141786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21523636.

The product of its digits is 24192, while the sum is 39.

The square root of 129141786 is about 11364.0567580420. The cubic root of 129141786 is about 505.4624864909.

The spelling of 129141786 in words is "one hundred twenty-nine million, one hundred forty-one thousand, seven hundred eighty-six".