129801 has 12 divisors (see below), whose sum is σ = 201552. Its totient is φ = 74088.

The previous prime is 129793. The next prime is 129803. The reversal of 129801 is 108921.

It is not a de Polignac number, because 129801 - 2³ = 129793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295 + ... + 588.

It is an arithmetic number, because the mean of its divisors is an integer number (16796).

2¹²⁹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

129801 is a deficient number, since it is larger than the sum of its proper divisors (71751).

129801 is an equidigital number, since it uses as much as digits as its factorization.

129801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 129801 is about 360.2790585088. The cubic root of 129801 is about 50.6321084364.

The spelling of 129801 in words is "one hundred twenty-nine thousand, eight hundred one".