129900072 has 32 divisors (see below), whose sum is σ = 328104000. Its totient is φ = 42852864.

The previous prime is 129900059. The next prime is 129900083. The reversal of 129900072 is 270009921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25572 + ... + 30227.

It is an arithmetic number, because the mean of its divisors is an integer number (10253250).

Almost surely, 2^129900072 is an apocalyptic number.

129900072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129900072 is an abundant number, since it is smaller than the sum of its proper divisors (198203928).

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

129900072 is a wasteful number, since it uses less digits than its factorization.

129900072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55905 (or 55901 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 129900072 is about 11397.3712758688. The cubic root of 129900072 is about 506.4498699293.

Adding to 129900072 its reverse (270009921), we get a palindrome (399909993).

The spelling of 129900072 in words is "one hundred twenty-nine million, nine hundred thousand, seventy-two".