129681253 has 8 divisors (see below), whose sum is σ = 147872088. Its totient is φ = 112664064.

The previous prime is 129681239. The next prime is 129681311. The reversal of 129681253 is 352186921.

It can be written as a sum of positive squares in 4 ways, for example, as 47361924 + 82319329 = 6882^2 + 9073^2 .

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 129681253 - 2¹⁷ = 129550181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129681203) 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, 293176 + ... + 293617.

It is an arithmetic number, because the mean of its divisors is an integer number (18484011).

Almost surely, 2^129681253 is an apocalyptic number.

129681253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129681253 is a deficient number, since it is larger than the sum of its proper divisors (18190835).

129681253 is a wasteful number, since it uses less digits than its factorization.

129681253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586823.

The product of its digits is 25920, while the sum is 37.

The square root of 129681253 is about 11387.7676916945. The cubic root of 129681253 is about 506.1653354733.

The spelling of 129681253 in words is "one hundred twenty-nine million, six hundred eighty-one thousand, two hundred fifty-three".