129971275 has 48 divisors (see below), whose sum is σ = 196416000. Its totient is φ = 85118880.

The previous prime is 129971249. The next prime is 129971291. The reversal of 129971275 is 572179921.

It is not a de Polignac number, because 129971275 - 2¹³ = 129963083 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 196896 + ... + 197554.

It is an arithmetic number, because the mean of its divisors is an integer number (4092000).

Almost surely, 2^129971275 is an apocalyptic number.

129971275 is a deficient number, since it is larger than the sum of its proper divisors (66444725).

129971275 is an equidigital number, since it uses as much as digits as its factorization.

129971275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 694 counting only the distinct ones).

The product of its digits is 79380, while the sum is 43.

The square root of 129971275 is about 11400.4945068186. The cubic root of 129971275 is about 506.5423876182.

The spelling of 129971275 in words is "one hundred twenty-nine million, nine hundred seventy-one thousand, two hundred seventy-five".