129822 has 32 divisors (see below), whose sum is σ = 324864. Its totient is φ = 33600.

The previous prime is 129803. The next prime is 129841. The reversal of 129822 is 228921.

It is an interprime number because it is at equal distance from previous prime (129803) and next prime (129841).

It is a junction number, because it is equal to n+sod(n) for n = 129792 and 129801.

It is a congruent number.

It is an unprimeable number.

129822 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322 + ... + 602.

It is an arithmetic number, because the mean of its divisors is an integer number (10152).

2¹²⁹⁸²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162432).

129822 is an abundant number, since it is smaller than the sum of its proper divisors (195042).

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

129822 is a wasteful number, since it uses less digits than its factorization.

129822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its digits is 576, while the sum is 24.

The square root of 129822 is about 360.3082014054. The cubic root of 129822 is about 50.6348388132.

Subtracting 129822 from its reverse (228921), we obtain a palindrome (99099).

The spelling of 129822 in words is "one hundred twenty-nine thousand, eight hundred twenty-two".