25423 has 2 divisors, whose sum is σ = 25424.
Its totient is φ = 25422.
The previous prime is 25411. The next prime is 25439. The reversal of 25423 is 32452.
It is an a-pointer prime, because the next prime (25439) can be obtained adding 25423 to its sum of digits (16).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 25423 - 25 = 25391 is a prime.
It is a plaindrome in base 9.
It is a junction number, because it is equal to n+sod(n) for n = 25397 and 25406.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (25453) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12711 + 12712.
It is an arithmetic number, because the mean of its divisors is an integer number (12712).
225423 is an apocalyptic number.
25423 is a deficient number, since it is larger than the sum of its proper divisors (1).
25423 is an equidigital number, since it uses as much as digits as its factorization.
25423 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 240, while the sum is 16.
The square root of 25423 is about 159.4459155952.
The cubic root of 25423 is about 29.4041705099.
Adding to 25423 its reverse (32452), we get a palindrome (57875).
It can be divided in two parts, 2542 and 3, that multiplied together give a triangular number (7626 = T123).
The spelling of 25423 in words is "twenty-five thousand, four hundred twenty-three".