129864 has 32 divisors (see below), whose sum is σ = 371520. Its totient is φ = 37056.

The previous prime is 129853. The next prime is 129887. The reversal of 129864 is 468921.

It is a congruent number.

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, 219 + ... + 554.

It is an arithmetic number, because the mean of its divisors is an integer number (11610).

2¹²⁹⁸⁶⁴ is an apocalyptic number.

129864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129864 is an abundant number, since it is smaller than the sum of its proper divisors (241656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129864 is a wasteful number, since it uses less digits than its factorization.

129864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 785 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 129864 is about 360.3664801282. The cubic root of 129864 is about 50.6402986838.

The spelling of 129864 in words is "one hundred twenty-nine thousand, eight hundred sixty-four".