129348855 has 24 divisors (see below), whose sum is σ = 230267232. Its totient is φ = 67120704.

The previous prime is 129348851. The next prime is 129348881. The reversal of 129348855 is 558843921.

It is not a de Polignac number, because 129348855 - 2² = 129348851 is a prime.

It is a super-2 number, since 2×129348855² = 33462252579622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 129348855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129348851) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 37179 + ... + 40508.

It is an arithmetic number, because the mean of its divisors is an integer number (9594468).

Almost surely, 2^129348855 is an apocalyptic number.

129348855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129348855 is a deficient number, since it is larger than the sum of its proper divisors (100918377).

129348855 is a wasteful number, since it uses less digits than its factorization.

129348855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77735 (or 77732 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 129348855 is about 11373.1638078417. The cubic root of 129348855 is about 505.7324990704.

The spelling of 129348855 in words is "one hundred twenty-nine million, three hundred forty-eight thousand, eight hundred fifty-five".