129396 has 24 divisors (see below), whose sum is σ = 310464. Its totient is φ = 41920.

The previous prime is 129379. The next prime is 129401. The reversal of 129396 is 693921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 623.

It is an arithmetic number, because the mean of its divisors is an integer number (12936).

2¹²⁹³⁹⁶ is an apocalyptic number.

It is an amenable number.

129396 is an abundant number, since it is smaller than the sum of its proper divisors (181068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129396 is a wasteful number, since it uses less digits than its factorization.

129396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 309 counting only the distinct ones).

The product of its digits is 2916, while the sum is 30.

The square root of 129396 is about 359.7165550819. The cubic root of 129396 is about 50.5793934642.

It can be divided in two parts, 129 and 396, that added together give a palindrome (525).

The spelling of 129396 in words is "one hundred twenty-nine thousand, three hundred ninety-six".