129071712 has 192 divisors, whose sum is σ = 445132800. Its totient is φ = 31726080.

The previous prime is 129071659. The next prime is 129071737. The reversal of 129071712 is 217170921.

It is a happy number.

It is a super-2 number, since 2×129071712² = 33319013677221888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129071712.

It is a congruent number.

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, 139989 + ... + 140907.

It is an arithmetic number, because the mean of its divisors is an integer number (2318400).

Almost surely, 2^129071712 is an apocalyptic number.

129071712 is a gapful number since it is divisible by the number (12) 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 129071712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222566400).

129071712 is an abundant number, since it is smaller than the sum of its proper divisors (316061088).

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

129071712 is a wasteful number, since it uses less digits than its factorization.

129071712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 30.

The square root of 129071712 is about 11360.9731977503. The cubic root of 129071712 is about 505.3710464602.

The spelling of 129071712 in words is "one hundred twenty-nine million, seventy-one thousand, seven hundred twelve".