16365 has 8 divisors (see below), whose sum is σ = 26208. Its totient is φ = 8720.

The previous prime is 16363. The next prime is 16369. The reversal of 16365 is 56361.

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

It is not a de Polignac number, because 16365 - 2¹ = 16363 is a prime.

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

16365 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16361) 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, 531 + ... + 560.

It is an arithmetic number, because the mean of its divisors is an integer number (3276).

2¹⁶³⁶⁵ is an apocalyptic number.

16365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16365 is a deficient number, since it is larger than the sum of its proper divisors (9843).

16365 is a wasteful number, since it uses less digits than its factorization.

16365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099.

The product of its digits is 540, while the sum is 21.

The square root of 16365 is about 127.9257597202. The cubic root of 16365 is about 25.3885951237.

The spelling of 16365 in words is "sixteen thousand, three hundred sixty-five".