SpecialNumber.py

# SpecialNumber.py
# Python 3
# Input a number and check whether it is a special number or not. eg: 145 is a special no. as 1!+4!+5!=145
# Chris Clarke
# 24.10.2015

def factorial(n):
    ans = 1
    for x in range(2, n+1):
        ans *= x
    return ans

def isSpecial(num):
    num2 = num
    sum = 0
    while num2>0:
        n = num2 % 10       # modulus = remainder
        sum += factorial(n) # add n! to sum
        if sum > num:
            return False
        num2 = num2 // 10   # integer division
    if sum == num:
        return True
    return False

def main():
    x = int (input ("Enter number: "))
    if isSpecial(x):
        print("%d is a special number!" % x)
    else:
        print("%d is not special." % x)

main()