2539 has 2 divisors, whose sum is σ = 2540.
Its totient is φ = 2538.
The previous prime is 2531. The next prime is 2543. The reversal of 2539 is 9352.
2539 = 182 + 192 + ... + 232.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 2539 - 23 = 2531 is a prime.
It is a plaindrome in base 12.
It is a nialpdrome in base 15.
It is not a weakly prime, because it can be changed into another prime (2531) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269 + 1270.
It is an arithmetic number, because the mean of its divisors is an integer number (1270).
2539 is a deficient number, since it is larger than the sum of its proper divisors (1).
2539 is an equidigital number, since it uses as much as digits as its factorization.
2539 is an evil number, because the sum of its binary digits is even.
The product of its digits is 270, while the sum is 19.
The square root of 2539 is about 50.3884907494.
The cubic root of 2539 is about 13.6422990996.
Adding to 2539 its product of digits (270), we get a square (2809 = 532).
It can be divided in two parts, 253 and 9, that added together give a palindrome (262).
The spelling of 2539 in words is "two thousand, five hundred thirty-nine".