129148140 has 72 divisors (see below), whose sum is σ = 397499760. Its totient is φ = 31306880.

The previous prime is 129148127. The next prime is 129148141. The reversal of 129148140 is 41841921.

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

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 129148098 and 129148107.

It is not an unprimeable number, because it can be changed into a prime (129148141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1635 + ... + 16154.

It is an arithmetic number, because the mean of its divisors is an integer number (5520830).

Almost surely, 2^129148140 is an apocalyptic number.

129148140 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 129148140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198749880).

129148140 is an abundant number, since it is smaller than the sum of its proper divisors (268351620).

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

129148140 is a wasteful number, since it uses less digits than its factorization.

129148140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17823 (or 17810 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 129148140 is about 11364.3363202609. The cubic root of 129148140 is about 505.4707762322.

The spelling of 129148140 in words is "one hundred twenty-nine million, one hundred forty-eight thousand, one hundred forty".