129896 has 16 divisors (see below), whose sum is σ = 262500. Its totient is φ = 59904.

The previous prime is 129893. The next prime is 129901. The reversal of 129896 is 698921.

It can be written as a sum of positive squares in 2 ways, for example, as 122500 + 7396 = 350^2 + 86^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (129893) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 521 + ... + 728.

2¹²⁹⁸⁹⁶ is an apocalyptic number.

It is an amenable number.

129896 is an abundant number, since it is smaller than the sum of its proper divisors (132604).

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

129896 is a wasteful number, since it uses less digits than its factorization.

129896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268 (or 1264 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 129896 is about 360.4108766394. The cubic root of 129896 is about 50.6444577950.

The spelling of 129896 in words is "one hundred twenty-nine thousand, eight hundred ninety-six".