129727712 has 12 divisors (see below), whose sum is σ = 255401496. Its totient is φ = 64863840.

The previous prime is 129727709. The next prime is 129727747. The reversal of 129727712 is 217727921.

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, 2026964 + ... + 2027027.

It is an arithmetic number, because the mean of its divisors is an integer number (21283458).

Almost surely, 2^129727712 is an apocalyptic number.

It is an amenable number.

129727712 is a deficient number, since it is larger than the sum of its proper divisors (125673784).

129727712 is an equidigital number, since it uses as much as digits as its factorization.

129727712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054001 (or 4053993 counting only the distinct ones).

The product of its digits is 24696, while the sum is 38.

The square root of 129727712 is about 11389.8073732614. The cubic root of 129727712 is about 506.2257737327.

The spelling of 129727712 in words is "one hundred twenty-nine million, seven hundred twenty-seven thousand, seven hundred twelve".