129191275 has 6 divisors (see below), whose sum is σ = 160197212. Its totient is φ = 103353000.

The previous prime is 129191273. The next prime is 129191323. The reversal of 129191275 is 572191921.

It is not a de Polignac number, because 129191275 - 2¹ = 129191273 is a prime.

It is a super-2 number, since 2×129191275² = 33380771072251250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129191273) 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 5 ways as a sum of consecutive naturals, for example, 2583801 + ... + 2583850.

Almost surely, 2^129191275 is an apocalyptic number.

129191275 is a deficient number, since it is larger than the sum of its proper divisors (31005937).

129191275 is an equidigital number, since it uses as much as digits as its factorization.

129191275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167661 (or 5167656 counting only the distinct ones).

The product of its digits is 11340, while the sum is 37.

The square root of 129191275 is about 11366.2339849222. The cubic root of 129191275 is about 505.5270450899.

The spelling of 129191275 in words is "one hundred twenty-nine million, one hundred ninety-one thousand, two hundred seventy-five".