129809246 has 32 divisors (see below), whose sum is σ = 242004672. Its totient is φ = 50941440.

The previous prime is 129809237. The next prime is 129809279. The reversal of 129809246 is 642908921.

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 15 ways as a sum of consecutive naturals, for example, 1436 + ... + 16176.

It is an arithmetic number, because the mean of its divisors is an integer number (7562646).

Almost surely, 2^129809246 is an apocalyptic number.

129809246 is a deficient number, since it is larger than the sum of its proper divisors (112195426).

129809246 is a wasteful number, since it uses less digits than its factorization.

129809246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 129809246 is about 11393.3860638530. The cubic root of 129809246 is about 506.3318059946.

The spelling of 129809246 in words is "one hundred twenty-nine million, eight hundred nine thousand, two hundred forty-six".