129440552 has 32 divisors (see below), whose sum is σ = 248160000. Its totient is φ = 63281088.

The previous prime is 129440539. The next prime is 129440569. The reversal of 129440552 is 255044921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67949 + ... + 69827.

It is an arithmetic number, because the mean of its divisors is an integer number (7755000).

Almost surely, 2^129440552 is an apocalyptic number.

It is an amenable number.

129440552 is a deficient number, since it is larger than the sum of its proper divisors (118719448).

129440552 is a wasteful number, since it uses less digits than its factorization.

129440552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073 (or 2069 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 129440552 is about 11377.1943817446. The cubic root of 129440552 is about 505.8519775121.

The spelling of 129440552 in words is "one hundred twenty-nine million, four hundred forty thousand, five hundred fifty-two".