129996 has 36 divisors (see below), whose sum is σ = 345072. Its totient is φ = 41184.

The previous prime is 129971. The next prime is 130003. The reversal of 129996 is 699921.

129996 = T₅₁ + T₅₂ + ... + T₉₆.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 129996.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 129996.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 750 + ... + 906.

2¹²⁹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172536).

129996 is an abundant number, since it is smaller than the sum of its proper divisors (215076).

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

129996 is a wasteful number, since it uses less digits than its factorization.

129996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 185 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 129996 is about 360.5495805018. The cubic root of 129996 is about 50.6574506168.

The spelling of 129996 in words is "one hundred twenty-nine thousand, nine hundred ninety-six".