129359505 has 32 divisors (see below), whose sum is σ = 237680640. Its totient is φ = 59417280.

The previous prime is 129359501. The next prime is 129359507. The reversal of 129359505 is 505953921.

It is not a de Polignac number, because 129359505 - 2² = 129359501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129359501) 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 31 ways as a sum of consecutive naturals, for example, 17497 + ... + 23766.

It is an arithmetic number, because the mean of its divisors is an integer number (7427520).

Almost surely, 2^129359505 is an apocalyptic number.

129359505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129359505 is a deficient number, since it is larger than the sum of its proper divisors (108321135).

129359505 is a wasteful number, since it uses less digits than its factorization.

129359505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41301.

The product of its (nonzero) digits is 60750, while the sum is 39.

The square root of 129359505 is about 11373.6320056524. The cubic root of 129359505 is about 505.7463785988.

The spelling of 129359505 in words is "one hundred twenty-nine million, three hundred fifty-nine thousand, five hundred five".