129404 has 24 divisors (see below), whose sum is σ = 263088. Its totient is φ = 55040.

The previous prime is 129403. The next prime is 129419. The reversal of 129404 is 404921.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662 + ... + 834.

It is an arithmetic number, because the mean of its divisors is an integer number (10962).

2¹²⁹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

129404 is an abundant number, since it is smaller than the sum of its proper divisors (133684).

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

129404 is a wasteful number, since it uses less digits than its factorization.

129404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 129404 is about 359.7276747764. The cubic root of 129404 is about 50.5804358117.

The spelling of 129404 in words is "one hundred twenty-nine thousand, four hundred four".