129725284 has 24 divisors (see below), whose sum is σ = 248496248. Its totient is φ = 58890240.

The previous prime is 129725263. The next prime is 129725303. The reversal of 129725284 is 482527921.

It can be written as a sum of positive squares in 4 ways, for example, as 1537600 + 128187684 = 1240^2 + 11322^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17277 + ... + 23620.

Almost surely, 2^129725284 is an apocalyptic number.

It is an amenable number.

129725284 is a deficient number, since it is larger than the sum of its proper divisors (118770964).

129725284 is a wasteful number, since it uses less digits than its factorization.

129725284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40975 (or 40973 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 129725284 is about 11389.7007862367. The cubic root of 129725284 is about 506.2226155182. Note that the first 3 decimals are identical.

The spelling of 129725284 in words is "one hundred twenty-nine million, seven hundred twenty-five thousand, two hundred eighty-four".