16243 has 4 divisors (see below), whose sum is σ = 16720. Its totient is φ = 15768.

The previous prime is 16231. The next prime is 16249. The reversal of 16243 is 34261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16243 - 2⁹ = 15731 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183 + ... + 256.

It is an arithmetic number, because the mean of its divisors is an integer number (4180).

2¹⁶²⁴³ is an apocalyptic number.

16243 is a deficient number, since it is larger than the sum of its proper divisors (477).

16243 is an equidigital number, since it uses as much as digits as its factorization.

16243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its digits is 144, while the sum is 16.

The square root of 16243 is about 127.4480286234. The cubic root of 16243 is about 25.3253475907.

The spelling of 16243 in words is "sixteen thousand, two hundred forty-three".