129016500 has 48 divisors (see below), whose sum is σ = 375700416. Its totient is φ = 34404000.

The previous prime is 129016493. The next prime is 129016501. The reversal of 129016500 is 5610921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129016501) 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, 41506 + ... + 44505.

It is an arithmetic number, because the mean of its divisors is an integer number (7827092).

Almost surely, 2^129016500 is an apocalyptic number.

129016500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129016500 is an abundant number, since it is smaller than the sum of its proper divisors (246683916).

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

129016500 is a wasteful number, since it uses less digits than its factorization.

129016500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86033 (or 86021 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 129016500 is about 11358.5430403727. The cubic root of 129016500 is about 505.2989766388.

The spelling of 129016500 in words is "one hundred twenty-nine million, sixteen thousand, five hundred".