129455555 has 8 divisors (see below), whose sum is σ = 156799152. Its totient is φ = 102596128.

The previous prime is 129455551. The next prime is 129455567. The reversal of 129455555 is 555554921.

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 129455555 - 2² = 129455551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129455551) 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 7 ways as a sum of consecutive naturals, for example, 120452 + ... + 121521.

It is an arithmetic number, because the mean of its divisors is an integer number (19599894).

Almost surely, 2^129455555 is an apocalyptic number.

129455555 is a deficient number, since it is larger than the sum of its proper divisors (27343597).

129455555 is a wasteful number, since it uses less digits than its factorization.

129455555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242085.

The product of its digits is 225000, while the sum is 41.

The square root of 129455555 is about 11377.8537079715. The cubic root of 129455555 is about 505.8715205994.

The spelling of 129455555 in words is "one hundred twenty-nine million, four hundred fifty-five thousand, five hundred fifty-five".