129945 has 8 divisors (see below), whose sum is σ = 207936. Its totient is φ = 69296.

The previous prime is 129937. The next prime is 129953. The reversal of 129945 is 549921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129937) and next prime (129953).

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 129945 - 2³ = 129937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4317 + ... + 4346.

It is an arithmetic number, because the mean of its divisors is an integer number (25992).

2¹²⁹⁹⁴⁵ is an apocalyptic number.

129945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129945 is a deficient number, since it is larger than the sum of its proper divisors (77991).

129945 is an equidigital number, since it uses as much as digits as its factorization.

129945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8671.

The product of its digits is 3240, while the sum is 30.

The square root of 129945 is about 360.4788482006. The cubic root of 129945 is about 50.6508251106.

The spelling of 129945 in words is "one hundred twenty-nine thousand, nine hundred forty-five".