25939 has 2 divisors, whose sum is σ = 25940. Its totient is φ = 25938.
The previous prime is 25933. The next prime is 25943. The reversal of 25939 is 93952.
25939 is nontrivially palindromic in base 2.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 25939 - 23 = 25931 is a prime.
It is a Chen prime.
25939 is a lucky number.
It is a nialpdrome in base 13 and base 16.
It is not a weakly prime, because it can be changed into another prime (25931) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12969 + 12970.
It is an arithmetic number, because the mean of its divisors is an integer number (12970).
225939 is an apocalyptic number.
25939 is the 132-nd centered triangular number.
25939 is a deficient number, since it is larger than the sum of its proper divisors (1).
25939 is an equidigital number, since it uses as much as digits as its factorization.
25939 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2430, while the sum is 28.
The square root of 25939 is about 161.0558909199. The cubic root of 25939 is about 29.6017743032.
It can be divided in two parts, 259 and 39, that multiplied together give a palindrome (10101).
The spelling of 25939 in words is "twenty-five thousand, nine hundred thirty-nine".
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