129140000 has 120 divisors (see below), whose sum is σ = 347176368. Its totient is φ = 46880000.

The previous prime is 129139991. The next prime is 129140023. The reversal of 129140000 is 41921.

It is a happy 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 19 ways as a sum of consecutive naturals, for example, 219707 + ... + 220293.

Almost surely, 2^129140000 is an apocalyptic number.

129140000 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 129140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173588184).

129140000 is an abundant number, since it is smaller than the sum of its proper divisors (218036368).

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

129140000 is an equidigital number, since it uses as much as digits as its factorization.

129140000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 129140000 is about 11363.9781766774. The cubic root of 129140000 is about 505.4601563384.

Adding to 129140000 its reverse (41921), we get a palindrome (129181921).

The spelling of 129140000 in words is "one hundred twenty-nine million, one hundred forty thousand".