129126 has 8 divisors (see below), whose sum is σ = 258264. Its totient is φ = 43040.

The previous prime is 129121. The next prime is 129127. The reversal of 129126 is 621921.

It is a sphenic number, since it is the product of 3 distinct primes.

129126 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129121) by changing a digit.

129126 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 3 ways as a sum of consecutive naturals, for example, 10755 + ... + 10766.

It is an arithmetic number, because the mean of its divisors is an integer number (32283).

2¹²⁹¹²⁶ is an apocalyptic number.

129126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129126 is a wasteful number, since it uses less digits than its factorization.

129126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21526.

The product of its digits is 216, while the sum is 21.

The square root of 129126 is about 359.3410636151. The cubic root of 129126 is about 50.5441890121.

The spelling of 129126 in words is "one hundred twenty-nine thousand, one hundred twenty-six".