129644 has 6 divisors (see below), whose sum is σ = 226884. Its totient is φ = 64820.

The previous prime is 129643. The next prime is 129671. The reversal of 129644 is 446921.

It is not an unprimeable number, because it can be changed into a prime (129641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16202 + ... + 16209.

It is an arithmetic number, because the mean of its divisors is an integer number (37814).

2¹²⁹⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

129644 is a deficient number, since it is larger than the sum of its proper divisors (97240).

129644 is a wasteful number, since it uses less digits than its factorization.

129644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32415 (or 32413 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 129644 is about 360.0611059251. The cubic root of 129644 is about 50.6116862820.

The spelling of 129644 in words is "one hundred twenty-nine thousand, six hundred forty-four".