129447 has 12 divisors (see below), whose sum is σ = 197080. Its totient is φ = 81648.

The previous prime is 129443. The next prime is 129449. The reversal of 129447 is 744921.

It is a happy number.

129447 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 129447 - 2² = 129443 is a prime.

It is a Duffinian number.

129447 is strictly pandigital in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 129447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208 + ... + 549.

2¹²⁹⁴⁴⁷ is an apocalyptic number.

129447 is a deficient number, since it is larger than the sum of its proper divisors (67633).

129447 is a wasteful number, since it uses less digits than its factorization.

129447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 779 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 129447 is about 359.7874372459. The cubic root of 129447 is about 50.5860376939.

It can be divided in two parts, 129 and 447, that added together give a square (576 = 24²).

The spelling of 129447 in words is "one hundred twenty-nine thousand, four hundred forty-seven".