129757552 has 40 divisors (see below), whose sum is σ = 256233600. Its totient is φ = 63645120.

The previous prime is 129757547. The next prime is 129757591. The reversal of 129757552 is 255757921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129757499 and 129757508.

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 in 7 ways as a sum of consecutive naturals, for example, 264027 + ... + 264517.

It is an arithmetic number, because the mean of its divisors is an integer number (6405840).

Almost surely, 2^129757552 is an apocalyptic number.

It is an amenable number.

129757552 is a deficient number, since it is larger than the sum of its proper divisors (126476048).

129757552 is a wasteful number, since it uses less digits than its factorization.

129757552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 775 counting only the distinct ones).

The product of its digits is 220500, while the sum is 43.

The square root of 129757552 is about 11391.1172410787. The cubic root of 129757552 is about 506.2645848158.

The spelling of 129757552 in words is "one hundred twenty-nine million, seven hundred fifty-seven thousand, five hundred fifty-two".