Python Math: Find the next previous palindrome of a specified number

Last update on April 24 2025 12:34:41 (UTC/GMT +8 hours)

23. Next and Previous Palindromes

Write a Python program to find the next and previous palindromes of a specified number.

A palindromic number or numeral palindrome is a number that remains the same when its digits are reversed. Like 15951, for example, it is "symmetrical". The term palindromic is derived from palindrome, which refers to a word (such as " REDIVIDER" or even "LIVE EVIL") whose spelling is unchanged when its letters are reversed.

Sample Solution:

Python Code:

def Previous_Palindrome(num):
    for x in range(num-1,0,-1):
        if str(x) == str(x)[::-1]:
            return x
print(Previous_Palindrome(99));
print(Previous_Palindrome(1221));

Sample Output:

88                                                                                                            
1111

Pictorial Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to calculate both the next and previous palindromic numbers for a given input and print both values.
• Write a Python function that returns a tuple containing the nearest lower and higher palindromes for a given number.
• Write a Python script to iterate over a range of numbers and for each number print its next and previous palindromic numbers if they exist.
• Write a Python program to check for palindromic neighbors of a number and then output them along with the difference from the original number.

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Python Code Editor:

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