129425760 has 216 divisors, whose sum is σ = 470682576. Its totient is φ = 32378880.

The previous prime is 129425731. The next prime is 129425767. The reversal of 129425760 is 67524921.

It is a super-3 number, since 3×129425760³ (a number of 25 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129425767) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 416005 + ... + 416315.

It is an arithmetic number, because the mean of its divisors is an integer number (2179086).

Almost surely, 2^129425760 is an apocalyptic number.

129425760 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 129425760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235341288).

129425760 is an abundant number, since it is smaller than the sum of its proper divisors (341256816).

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

129425760 is a wasteful number, since it uses less digits than its factorization.

129425760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 338 counting only the distinct ones).

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

The square root of 129425760 is about 11376.5442907765. The cubic root of 129425760 is about 505.8327077975.

The spelling of 129425760 in words is "one hundred twenty-nine million, four hundred twenty-five thousand, seven hundred sixty".