25643

25643 is a prime number. It is the 2839th prime number. In base 10, 25643 is a palindromic number, meaning it reads the same forwards and backward. Its reverse is also 25643. The number 25643 can be expressed as the sum of two squares in two different ways: 143^2 + 76^2 and 137^2 + 90^2. The prime factorization of 25643 is simply 25643 itself, as it is a prime number. The number 25643 has no known special mathematical properties beyond its primality and palindromic nature in base 10. It does not appear prominently in number theory sequences or famous mathematical constants. The digits of 25643 sum to 20 (2 + 5 + 6 + 4 + 3 = 20). The number 25643 is not divisible by any small primes such as 2, 3, or 5.