129732049 has 8 divisors (see below), whose sum is σ = 137547720. Its totient is φ = 121936896.

The previous prime is 129732047. The next prime is 129732059. The reversal of 129732049 is 940237921.

It can be written as a sum of positive squares in 4 ways, for example, as 74080449 + 55651600 = 8607^2 + 7460^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 129732049 - 2¹ = 129732047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129731999 and 129732017.

It is not an unprimeable number, because it can be changed into a prime (129732041) by changing a digit.

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, 9037 + ... + 18469.

It is an arithmetic number, because the mean of its divisors is an integer number (17193465).

Almost surely, 2^129732049 is an apocalyptic number.

It is an amenable number.

129732049 is a deficient number, since it is larger than the sum of its proper divisors (7815671).

129732049 is an equidigital number, since it uses as much as digits as its factorization.

129732049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10259.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 129732049 is about 11389.9977611938. The cubic root of 129732049 is about 506.2314149759.

The spelling of 129732049 in words is "one hundred twenty-nine million, seven hundred thirty-two thousand, forty-nine".