16305 has 8 divisors (see below), whose sum is σ = 26112. Its totient is φ = 8688.

The previous prime is 16301. The next prime is 16319. The reversal of 16305 is 50361.

16305 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16305 - 2² = 16301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1087 = 16305 / (1 + 6 + 3 + 0 + 5).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16301) 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, 529 + ... + 558.

It is an arithmetic number, because the mean of its divisors is an integer number (3264).

2¹⁶³⁰⁵ is an apocalyptic number.

16305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16305 is a deficient number, since it is larger than the sum of its proper divisors (9807).

16305 is a wasteful number, since it uses less digits than its factorization.

16305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 16305 is about 127.6910333579. The cubic root of 16305 is about 25.3575292069.

Subtracting from 16305 its sum of digits (15), we obtain a triangular number (16290 = T₁₈₀).

Adding to 16305 its reverse (50361), we get a palindrome (66666).

The spelling of 16305 in words is "sixteen thousand, three hundred five".