129727 has 8 divisors (see below), whose sum is σ = 148176. Its totient is φ = 112512.

The previous prime is 129719. The next prime is 129733. The reversal of 129727 is 727921.

It is a happy number.

129727 is nontrivially palindromic in base 2.

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 129727 - 2³ = 129719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129695 and 129704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73 + ... + 514.

It is an arithmetic number, because the mean of its divisors is an integer number (18522).

2¹²⁹⁷²⁷ is an apocalyptic number.

129727 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

129727 is a deficient number, since it is larger than the sum of its proper divisors (18449).

129727 is a wasteful number, since it uses less digits than its factorization.

129727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its digits is 1764, while the sum is 28.

The square root of 129727 is about 360.1763456975. The cubic root of 129727 is about 50.6224847605.

The spelling of 129727 in words is "one hundred twenty-nine thousand, seven hundred twenty-seven".