10239 has 4 divisors (see below), whose sum is σ = 13656. Its totient is φ = 6824.

The previous prime is 10223. The next prime is 10243. The reversal of 10239 is 93201.

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 10239 - 2⁴ = 10223 is a prime.

It is a D-number.

10239 is a lucky number.

It is a plaindrome in base 8 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10259) by changing a digit.

Being equal to 10×2¹⁰-1, it is a Woodall number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1704 + ... + 1709.

It is an arithmetic number, because the mean of its divisors is an integer number (3414).

2¹⁰²³⁹ is an apocalyptic number.

10239 is a deficient number, since it is larger than the sum of its proper divisors (3417).

10239 is an equidigital number, since it uses as much as digits as its factorization.

10239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3416.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 10239 is about 101.1879439459. The cubic root of 10239 is about 21.7146340302.

It can be divided in two parts, 102 and 39, that added together give a palindrome (141).

The spelling of 10239 in words is "ten thousand, two hundred thirty-nine".