129406 has 8 divisors (see below), whose sum is σ = 196560. Its totient is φ = 63888.

The previous prime is 129403. The next prime is 129419. The reversal of 129406 is 604921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186 + ... + 541.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2¹²⁹⁴⁰⁶ is an apocalyptic number.

129406 is a deficient number, since it is larger than the sum of its proper divisors (67154).

129406 is an equidigital number, since it uses as much as digits as its factorization.

129406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 129406 is about 359.7304546463. The cubic root of 129406 is about 50.5806963919.

It can be divided in two parts, 129 and 406, that added together give a palindrome (535).

The spelling of 129406 in words is "one hundred twenty-nine thousand, four hundred six".