129529422 has 128 divisors (see below), whose sum is σ = 345600000. Its totient is φ = 35497440.

The previous prime is 129529397. The next prime is 129529453. The reversal of 129529422 is 224925921.

129529422 is a `hidden beast` number, since 129 + 529 + 4 + 2 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 259329 + ... + 259827.

It is an arithmetic number, because the mean of its divisors is an integer number (2700000).

Almost surely, 2^129529422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129529422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172800000).

129529422 is an abundant number, since it is smaller than the sum of its proper divisors (216070578).

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

129529422 is a wasteful number, since it uses less digits than its factorization.

129529422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 557 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 129529422 is about 11381.0993317869. The cubic root of 129529422 is about 505.9677186257.

The spelling of 129529422 in words is "one hundred twenty-nine million, five hundred twenty-nine thousand, four hundred twenty-two".