129281932 has 12 divisors (see below), whose sum is σ = 243646816. Its totient is φ = 59668560.

The previous prime is 129281903. The next prime is 129281953. The reversal of 129281932 is 239182921.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 129281891 and 129281900.

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, 1243044 + ... + 1243147.

Almost surely, 2^129281932 is an apocalyptic number.

It is an amenable number.

129281932 is a deficient number, since it is larger than the sum of its proper divisors (114364884).

129281932 is a wasteful number, since it uses less digits than its factorization.

129281932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486208 (or 2486206 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 129281932 is about 11370.2212819276. The cubic root of 129281932 is about 505.6452647596.

The spelling of 129281932 in words is "one hundred twenty-nine million, two hundred eighty-one thousand, nine hundred thirty-two".