129245760 has 224 divisors, whose sum is σ = 521329920. Its totient is φ = 29528064.

The previous prime is 129245759. The next prime is 129245791. The reversal of 129245760 is 67542921.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59412 + ... + 61548.

Almost surely, 2^129245760 is an apocalyptic number.

129245760 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 129245760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260664960).

129245760 is an abundant number, since it is smaller than the sum of its proper divisors (392084160).

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

129245760 is a wasteful number, since it uses less digits than its factorization.

129245760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 129245760 is about 11368.6305243860. The cubic root of 129245760 is about 505.5981019263.

The spelling of 129245760 in words is "one hundred twenty-nine million, two hundred forty-five thousand, seven hundred sixty".