129711296 has 56 divisors (see below), whose sum is σ = 302416464. Its totient is φ = 54420480.

The previous prime is 129711289. The next prime is 129711313. The reversal of 129711296 is 692117921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2066 + ... + 16238.

It is an arithmetic number, because the mean of its divisors is an integer number (5400294).

Almost surely, 2^129711296 is an apocalyptic number.

129711296 is a gapful number since it is divisible by the number (16) 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 129711296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151208232).

129711296 is an abundant number, since it is smaller than the sum of its proper divisors (172705168).

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

129711296 is a wasteful number, since it uses less digits than its factorization.

129711296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14209 (or 14199 counting only the distinct ones).

The product of its digits is 13608, while the sum is 38.

The square root of 129711296 is about 11389.0867061411. The cubic root of 129711296 is about 506.2044198967.

The spelling of 129711296 in words is "one hundred twenty-nine million, seven hundred eleven thousand, two hundred ninety-six".