129969120 has 96 divisors (see below), whose sum is σ = 430980480. Its totient is φ = 32832000.

The previous prime is 129969109. The next prime is 129969137. The reversal of 129969120 is 21969921.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1995 + ... + 16245.

It is an arithmetic number, because the mean of its divisors is an integer number (4489380).

Almost surely, 2^129969120 is an apocalyptic number.

129969120 is a gapful number since it is divisible by the number (10) 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 129969120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215490240).

129969120 is an abundant number, since it is smaller than the sum of its proper divisors (301011360).

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

129969120 is a wasteful number, since it uses less digits than its factorization.

129969120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14288 (or 14280 counting only the distinct ones).

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

The square root of 129969120 is about 11400.3999929827. The cubic root of 129969120 is about 506.5395880127.

The spelling of 129969120 in words is "one hundred twenty-nine million, nine hundred sixty-nine thousand, one hundred twenty".