16239 has 4 divisors (see below), whose sum is σ = 21656.
Its totient is φ = 10824.
The previous prime is 16231. The next prime is 16249. The reversal of 16239 is 93261.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 16239 - 23 = 16231 is a prime.
It is a D-number.
It is a Duffinian number.
It is a plaindrome in base 11.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (16231) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2704 + ... + 2709.
It is an arithmetic number, because the mean of its divisors is an integer number (5414).
216239 is an apocalyptic number.
16239 is a deficient number, since it is larger than the sum of its proper divisors (5417).
16239 is an equidigital number, since it uses as much as digits as its factorization.
16239 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5416.
The product of its digits is 324, while the sum is 21.
The square root of 16239 is about 127.4323349861.
The cubic root of 16239 is about 25.3232685472.
The spelling of 16239 in words is "sixteen thousand, two hundred thirty-nine".