129507572 has 48 divisors (see below), whose sum is σ = 254876160. Its totient is φ = 57280608.

The previous prime is 129507571. The next prime is 129507577. The reversal of 129507572 is 275705921.

It is a super-2 number, since 2×129507572² = 33544422410670368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129507571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74303 + ... + 76025.

It is an arithmetic number, because the mean of its divisors is an integer number (5309920).

Almost surely, 2^129507572 is an apocalyptic number.

It is an amenable number.

129507572 is a deficient number, since it is larger than the sum of its proper divisors (125368588).

129507572 is a wasteful number, since it uses less digits than its factorization.

With its successor (129507573) it forms an eRAP, since the sums of their prime factors are consecutive (1812 and 1813).

129507572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1810 counting only the distinct ones).

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

The square root of 129507572 is about 11380.1393664577. The cubic root of 129507572 is about 505.9392668753.

The spelling of 129507572 in words is "one hundred twenty-nine million, five hundred seven thousand, five hundred seventy-two".