129216534 has 8 divisors (see below), whose sum is σ = 258433080. Its totient is φ = 43072176.

The previous prime is 129216509. The next prime is 129216551. The reversal of 129216534 is 435612921.

It is a sphenic number, since it is the product of 3 distinct primes.

129216534 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 129216495 and 129216504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10768039 + ... + 10768050.

It is an arithmetic number, because the mean of its divisors is an integer number (32304135).

Almost surely, 2^129216534 is an apocalyptic number.

129216534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129216534 is a wasteful number, since it uses less digits than its factorization.

129216534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21536094.

The product of its digits is 12960, while the sum is 33.

The square root of 129216534 is about 11367.3450726192. The cubic root of 129216534 is about 505.5599892020.

The spelling of 129216534 in words is "one hundred twenty-nine million, two hundred sixteen thousand, five hundred thirty-four".