129012886 has 16 divisors (see below), whose sum is σ = 200060928. Its totient is φ = 62332200.

The previous prime is 129012883. The next prime is 129012889. The reversal of 129012886 is 688210921.

It is an interprime number because it is at equal distance from previous prime (129012883) and next prime (129012889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129012883) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 59131 + ... + 61273.

It is an arithmetic number, because the mean of its divisors is an integer number (12503808).

Almost surely, 2^129012886 is an apocalyptic number.

129012886 is a deficient number, since it is larger than the sum of its proper divisors (71048042).

129012886 is a wasteful number, since it uses less digits than its factorization.

129012886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 129012886 is about 11358.3839519537. The cubic root of 129012886 is about 505.2942584631.

The spelling of 129012886 in words is "one hundred twenty-nine million, twelve thousand, eight hundred eighty-six".