129834405 has 12 divisors (see below), whose sum is σ = 225046380. Its totient is φ = 69244992.

The previous prime is 129834373. The next prime is 129834407. The reversal of 129834405 is 504438921.

It can be written as a sum of positive squares in 2 ways, for example, as 43678881 + 86155524 = 6609^2 + 9282^2 .

It is not a de Polignac number, because 129834405 - 2⁵ = 129834373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129834405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129834407) 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 11 ways as a sum of consecutive naturals, for example, 1442560 + ... + 1442649.

It is an arithmetic number, because the mean of its divisors is an integer number (18753865).

Almost surely, 2^129834405 is an apocalyptic number.

129834405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129834405 is a deficient number, since it is larger than the sum of its proper divisors (95211975).

129834405 is a wasteful number, since it uses less digits than its factorization.

129834405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885220 (or 2885217 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 129834405 is about 11394.4901158411. The cubic root of 129834405 is about 506.3645154751.

The spelling of 129834405 in words is "one hundred twenty-nine million, eight hundred thirty-four thousand, four hundred five".