129000032 has 24 divisors (see below), whose sum is σ = 290250576. Its totient is φ = 55285632.

The previous prime is 129000017. The next prime is 129000037. The reversal of 129000032 is 230000921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129000037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287723 + ... + 288170.

It is an arithmetic number, because the mean of its divisors is an integer number (12093774).

Almost surely, 2^129000032 is an apocalyptic number.

It is an amenable number.

129000032 is an abundant number, since it is smaller than the sum of its proper divisors (161250544).

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

129000032 is an equidigital number, since it uses as much as digits as its factorization.

129000032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575910 (or 575902 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 129000032 is about 11357.8181003219. The cubic root of 129000032 is about 505.2774765009.

Adding to 129000032 its reverse (230000921), we get a palindrome (359000953).

The spelling of 129000032 in words is "one hundred twenty-nine million, thirty-two", and thus it is an aban number.