129140775 has 36 divisors (see below), whose sum is σ = 236964000. Its totient is φ = 67190400.

The previous prime is 129140771. The next prime is 129140801. The reversal of 129140775 is 577041921.

It is a happy number.

It is not a de Polignac number, because 129140775 - 2² = 129140771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129140771) 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 35 ways as a sum of consecutive naturals, for example, 2226 + ... + 16224.

Almost surely, 2^129140775 is an apocalyptic number.

129140775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129140775 is a deficient number, since it is larger than the sum of its proper divisors (107823225).

129140775 is a wasteful number, since it uses less digits than its factorization.

129140775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056 (or 14048 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 129140775 is about 11364.0122756006. The cubic root of 129140775 is about 505.4611674655.

The spelling of 129140775 in words is "one hundred twenty-nine million, one hundred forty thousand, seven hundred seventy-five".