129069912 has 32 divisors (see below), whose sum is σ = 331398000. Its totient is φ = 41860224.

The previous prime is 129069911. The next prime is 129069917. The reversal of 129069912 is 219960921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129069911) 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, 71787 + ... + 73562.

Almost surely, 2^129069912 is an apocalyptic number.

129069912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129069912 is an abundant number, since it is smaller than the sum of its proper divisors (202328088).

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

129069912 is a wasteful number, since it uses less digits than its factorization.

129069912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145395 (or 145391 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 129069912 is about 11360.8939789085. The cubic root of 129069912 is about 505.3686971923.

The spelling of 129069912 in words is "one hundred twenty-nine million, sixty-nine thousand, nine hundred twelve".