129752570 has 8 divisors (see below), whose sum is σ = 233554644. Its totient is φ = 51901024.

The previous prime is 129752569. The next prime is 129752573. The reversal of 129752570 is 75257921.

It can be written as a sum of positive squares in 2 ways, for example, as 129299641 + 452929 = 11371^2 + 673^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (129752573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6487619 + ... + 6487638.

Almost surely, 2^129752570 is an apocalyptic number.

129752570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129752570 is a deficient number, since it is larger than the sum of its proper divisors (103802074).

129752570 is a wasteful number, since it uses less digits than its factorization.

129752570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12975264.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 129752570 is about 11390.8985598152. The cubic root of 129752570 is about 506.2581054436.

The spelling of 129752570 in words is "one hundred twenty-nine million, seven hundred fifty-two thousand, five hundred seventy".