129325056 has 192 divisors, whose sum is σ = 410941440. Its totient is φ = 35389440.

The previous prime is 129325013. The next prime is 129325081. The reversal of 129325056 is 650523921.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1333200 + ... + 1333296.

It is an arithmetic number, because the mean of its divisors is an integer number (2140320).

Almost surely, 2^129325056 is an apocalyptic number.

129325056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129325056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205470720).

129325056 is an abundant number, since it is smaller than the sum of its proper divisors (281616384).

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

129325056 is an equidigital number, since it uses as much as digits as its factorization.

129325056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 129325056 is about 11372.1174809268. The cubic root of 129325056 is about 505.7014804581.

Adding to 129325056 its reverse (650523921), we get a palindrome (779848977).

The spelling of 129325056 in words is "one hundred twenty-nine million, three hundred twenty-five thousand, fifty-six".