129472005 has 16 divisors (see below), whose sum is σ = 223090560. Its totient is φ = 63739968.

The previous prime is 129471977. The next prime is 129472009. The reversal of 129472005 is 500274921.

It is not a de Polignac number, because 129472005 - 2⁶ = 129471941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129472009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331785 + ... + 332174.

It is an arithmetic number, because the mean of its divisors is an integer number (13943160).

Almost surely, 2^129472005 is an apocalyptic number.

129472005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129472005 is a deficient number, since it is larger than the sum of its proper divisors (93618555).

129472005 is a wasteful number, since it uses less digits than its factorization.

129472005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663980.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 129472005 is about 11378.5765805746. The cubic root of 129472005 is about 505.8929468309.

The spelling of 129472005 in words is "one hundred twenty-nine million, four hundred seventy-two thousand, five".