129955405 has 8 divisors (see below), whose sum is σ = 162726912. Its totient is φ = 99444048.

The previous prime is 129955373. The next prime is 129955447. The reversal of 129955405 is 504559921.

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 129955405 - 2⁵ = 129955373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564909 + ... + 565138.

It is an arithmetic number, because the mean of its divisors is an integer number (20340864).

Almost surely, 2^129955405 is an apocalyptic number.

It is an amenable number.

129955405 is a deficient number, since it is larger than the sum of its proper divisors (32771507).

129955405 is a wasteful number, since it uses less digits than its factorization.

129955405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130075.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 129955405 is about 11399.7984631308. The cubic root of 129955405 is about 506.5217698447.

The spelling of 129955405 in words is "one hundred twenty-nine million, nine hundred fifty-five thousand, four hundred five".