129254144 has 36 divisors (see below), whose sum is σ = 260610000. Its totient is φ = 63974400.

The previous prime is 129254143. The next prime is 129254201. The reversal of 129254144 is 441452921.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 129254144.

It is not an unprimeable number, because it can be changed into a prime (129254141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23357 + ... + 28355.

Almost surely, 2^129254144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129254144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130305000).

129254144 is an abundant number, since it is smaller than the sum of its proper divisors (131355856).

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

129254144 is an equidigital number, since it uses as much as digits as its factorization.

129254144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116 (or 5102 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 129254144 is about 11368.9992523529. Note that the first 3 decimals coincide. The cubic root of 129254144 is about 505.6090341814.

The spelling of 129254144 in words is "one hundred twenty-nine million, two hundred fifty-four thousand, one hundred forty-four".