129285724 has 6 divisors (see below), whose sum is σ = 226250024. Its totient is φ = 64642860.

The previous prime is 129285719. The next prime is 129285743. The reversal of 129285724 is 427582921.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 16160712 + ... + 16160719.

Almost surely, 2^129285724 is an apocalyptic number.

It is an amenable number.

129285724 is a deficient number, since it is larger than the sum of its proper divisors (96964300).

129285724 is a wasteful number, since it uses less digits than its factorization.

129285724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32321435 (or 32321433 counting only the distinct ones).

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

The square root of 129285724 is about 11370.3880320770. The cubic root of 129285724 is about 505.6502084462.

The spelling of 129285724 in words is "one hundred twenty-nine million, two hundred eighty-five thousand, seven hundred twenty-four".