129216532 has 12 divisors (see below), whose sum is σ = 226274356. Its totient is φ = 64566720.

The previous prime is 129216509. The next prime is 129216551. The reversal of 129216532 is 235612921.

It can be written as a sum of positive squares in 2 ways, for example, as 34621456 + 94595076 = 5884^2 + 9726^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129216494 and 129216503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2769 + ... + 16312.

Almost surely, 2^129216532 is an apocalyptic number.

It is an amenable number.

129216532 is a deficient number, since it is larger than the sum of its proper divisors (97057824).

129216532 is a wasteful number, since it uses less digits than its factorization.

129216532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20778 (or 20776 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 129216532 is about 11367.3449846479. The cubic root of 129216532 is about 505.5599865937.

The spelling of 129216532 in words is "one hundred twenty-nine million, two hundred sixteen thousand, five hundred thirty-two".