129424 has 10 divisors (see below), whose sum is σ = 250790. Its totient is φ = 64704.

The previous prime is 129419. The next prime is 129439. The reversal of 129424 is 424921.

It can be written as a sum of positive squares in only one way, i.e., 71824 + 57600 = 268^2 + 240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129395 and 129404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4029 + ... + 4060.

It is an arithmetic number, because the mean of its divisors is an integer number (25079).

2¹²⁹⁴²⁴ is an apocalyptic number.

It is an amenable number.

129424 is a deficient number, since it is larger than the sum of its proper divisors (121366).

129424 is an equidigital number, since it uses as much as digits as its factorization.

129424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097 (or 8091 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 129424 is about 359.7554725088. The cubic root of 129424 is about 50.5830414927.

The spelling of 129424 in words is "one hundred twenty-nine thousand, four hundred twenty-four".