129145 has 8 divisors (see below), whose sum is σ = 161856. Its totient is φ = 98736.

The previous prime is 129127. The next prime is 129169. The reversal of 129145 is 541921.

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

It is a cyclic number.

It is not a de Polignac number, because 129145 - 2⁵ = 129113 is a prime.

It is a Duffinian number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 447 + ... + 676.

It is an arithmetic number, because the mean of its divisors is an integer number (20232).

2¹²⁹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

129145 is a deficient number, since it is larger than the sum of its proper divisors (32711).

129145 is a wasteful number, since it uses less digits than its factorization.

129145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151.

The product of its digits is 360, while the sum is 22.

The square root of 129145 is about 359.3674999217. The cubic root of 129145 is about 50.5466679668.

The spelling of 129145 in words is "one hundred twenty-nine thousand, one hundred forty-five".