129478 has 8 divisors (see below), whose sum is σ = 199080. Its totient is φ = 63120.

The previous prime is 129469. The next prime is 129491. The reversal of 129478 is 874921.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

129478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 3 ways as a sum of consecutive naturals, for example, 708 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (24885).

2¹²⁹⁴⁷⁸ is an apocalyptic number.

129478 is a deficient number, since it is larger than the sum of its proper divisors (69602).

129478 is a wasteful number, since it uses less digits than its factorization.

129478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its digits is 4032, while the sum is 31.

The square root of 129478 is about 359.8305156598. The cubic root of 129478 is about 50.5900754906.

The spelling of 129478 in words is "one hundred twenty-nine thousand, four hundred seventy-eight".