129684532 has 24 divisors (see below), whose sum is σ = 235343360. Its totient is φ = 62462880.

The previous prime is 129684523. The next prime is 129684539. The reversal of 129684532 is 235486921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129684539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26113 + ... + 30679.

Almost surely, 2^129684532 is an apocalyptic number.

It is an amenable number.

129684532 is a deficient number, since it is larger than the sum of its proper divisors (105658828).

129684532 is a wasteful number, since it uses less digits than its factorization.

129684532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831 (or 4829 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 129684532 is about 11387.9116610553. The cubic root of 129684532 is about 506.1696015799.

It can be divided in two parts, 12 and 9684532, that added together give a square (9684544 = 3112²).

The spelling of 129684532 in words is "one hundred twenty-nine million, six hundred eighty-four thousand, five hundred thirty-two".