129222 has 16 divisors (see below), whose sum is σ = 287280. Its totient is φ = 43056.

The previous prime is 129221. The next prime is 129223. The reversal of 129222 is 222921.

It is an interprime number because it is at equal distance from previous prime (129221) and next prime (129223).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 129195 and 129204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143 + ... + 1250.

It is an arithmetic number, because the mean of its divisors is an integer number (17955).

2¹²⁹²²² is an apocalyptic number.

129222 is an abundant number, since it is smaller than the sum of its proper divisors (158058).

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

129222 is a wasteful number, since it uses less digits than its factorization.

129222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404 (or 2398 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 129222 is about 359.4746166282. The cubic root of 129222 is about 50.5567117681.

It can be divided in two parts, 129 and 222, that added together give a triangular number (351 = T₂₆).

The spelling of 129222 in words is "one hundred twenty-nine thousand, two hundred twenty-two".