129040495 has 16 divisors (see below), whose sum is σ = 163427040. Its totient is φ = 97542144.

The previous prime is 129040453. The next prime is 129040519. The reversal of 129040495 is 594040921.

It is a cyclic number.

It is not a de Polignac number, because 129040495 - 2⁷ = 129040367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129040495.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 39567 + ... + 42703.

It is an arithmetic number, because the mean of its divisors is an integer number (10214190).

Almost surely, 2^129040495 is an apocalyptic number.

129040495 is a deficient number, since it is larger than the sum of its proper divisors (34386545).

129040495 is a wasteful number, since it uses less digits than its factorization.

129040495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 129040495 is about 11359.5992446917. The cubic root of 129040495 is about 505.3303005324.

The spelling of 129040495 in words is "one hundred twenty-nine million, forty thousand, four hundred ninety-five".