129267120 has 80 divisors (see below), whose sum is σ = 406759680. Its totient is φ = 33952512.

The previous prime is 129267119. The next prime is 129267121. The reversal of 129267120 is 21762921.

It is an interprime number because it is at equal distance from previous prime (129267119) and next prime (129267121).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (129267121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12061 + ... + 20099.

It is an arithmetic number, because the mean of its divisors is an integer number (5084496).

Almost surely, 2^129267120 is an apocalyptic number.

129267120 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 129267120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203379840).

129267120 is an abundant number, since it is smaller than the sum of its proper divisors (277492560).

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

129267120 is a wasteful number, since it uses less digits than its factorization.

129267120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8122 (or 8116 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 129267120 is about 11369.5699127100. The cubic root of 129267120 is about 505.6259532090.

The spelling of 129267120 in words is "one hundred twenty-nine million, two hundred sixty-seven thousand, one hundred twenty".