129441024 has 144 divisors (see below), whose sum is σ = 390322240. Its totient is φ = 42301440.

The previous prime is 129441001. The next prime is 129441029. The reversal of 129441024 is 420144921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129441029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421479 + ... + 421785.

Almost surely, 2^129441024 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 129441024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195161120).

129441024 is an abundant number, since it is smaller than the sum of its proper divisors (260881216).

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

129441024 is an equidigital number, since it uses as much as digits as its factorization.

129441024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 129441024 is about 11377.2151249768. The cubic root of 129441024 is about 505.8525923680.

Adding to 129441024 its reverse (420144921), we get a palindrome (549585945).

The spelling of 129441024 in words is "one hundred twenty-nine million, four hundred forty-one thousand, twenty-four".