129027085 has 16 divisors (see below), whose sum is σ = 169139520. Its totient is φ = 93709440.

The previous prime is 129027083. The next prime is 129027089. The reversal of 129027085 is 580720921.

It is not a de Polignac number, because 129027085 - 2¹ = 129027083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129027085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129027083) 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 15 ways as a sum of consecutive naturals, for example, 60721 + ... + 62809.

It is an arithmetic number, because the mean of its divisors is an integer number (10571220).

Almost surely, 2^129027085 is an apocalyptic number.

It is an amenable number.

129027085 is a deficient number, since it is larger than the sum of its proper divisors (40112435).

129027085 is a wasteful number, since it uses less digits than its factorization.

129027085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 129027085 is about 11359.0089796602. The cubic root of 129027085 is about 505.3127951385.

The spelling of 129027085 in words is "one hundred twenty-nine million, twenty-seven thousand, eighty-five".