129755806 has 8 divisors (see below), whose sum is σ = 194772024. Its totient is φ = 64831800.

The previous prime is 129755789. The next prime is 129755839. The reversal of 129755806 is 608557921.

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

It is a congruent number.

It is an unprimeable number.

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, 19420 + ... + 25231.

It is an arithmetic number, because the mean of its divisors is an integer number (24346503).

Almost surely, 2^129755806 is an apocalyptic number.

129755806 is a deficient number, since it is larger than the sum of its proper divisors (65016218).

129755806 is a wasteful number, since it uses less digits than its factorization.

129755806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46106.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 129755806 is about 11391.0406021575. The cubic root of 129755806 is about 506.2623140631.

It can be divided in two parts, 12975 and 5806, that added together give a palindrome (18781).

The spelling of 129755806 in words is "one hundred twenty-nine million, seven hundred fifty-five thousand, eight hundred six".