40253 has 2 divisors, whose sum is σ = 40254.
Its totient is φ = 40252.
The previous prime is 40241. The next prime is 40277. The reversal of 40253 is 35204.
Adding to 40253 its reverse (35204), we get a palindrome (75457).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 38809 + 1444 = 197^2 + 38^2
It is a cyclic number.
It is not a de Polignac number, because 40253 - 24 = 40237 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (40213) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20126 + 20127.
It is an arithmetic number, because the mean of its divisors is an integer number (20127).
240253 is an apocalyptic number.
It is an amenable number.
40253 is a deficient number, since it is larger than the sum of its proper divisors (1).
40253 is an equidigital number, since it uses as much as digits as its factorization.
40253 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 120, while the sum is 14.
The square root of 40253 is about 200.6315030099.
The cubic root of 40253 is about 34.2714714320.
The spelling of 40253 in words is "forty thousand, two hundred fifty-three".