129285212 has 24 divisors (see below), whose sum is σ = 258943104. Its totient is φ = 55328112.

The previous prime is 129285209. The next prime is 129285217. The reversal of 129285212 is 212582921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129285217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19103 + ... + 24969.

It is an arithmetic number, because the mean of its divisors is an integer number (10789296).

Almost surely, 2^129285212 is an apocalyptic number.

It is an amenable number.

129285212 is an abundant number, since it is smaller than the sum of its proper divisors (129657892).

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

129285212 is a wasteful number, since it uses less digits than its factorization.

129285212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665 (or 6663 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 129285212 is about 11370.3655174317. The cubic root of 129285212 is about 505.6495409499.

The spelling of 129285212 in words is "one hundred twenty-nine million, two hundred eighty-five thousand, two hundred twelve".