12240257 has 12 divisors (see below), whose sum is σ = 12964608. Its totient is φ = 11550600.

The previous prime is 12240227. The next prime is 12240271. The reversal of 12240257 is 75204221.

It is a happy number.

It is not a de Polignac number, because 12240257 - 2²⁰ = 11191681 is a prime.

It is a Duffinian number.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12240227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45032 + ... + 45302.

It is an arithmetic number, because the mean of its divisors is an integer number (1080384).

Almost surely, 2^12240257 is an apocalyptic number.

It is an amenable number.

12240257 is a deficient number, since it is larger than the sum of its proper divisors (724351).

12240257 is an equidigital number, since it uses as much as digits as its factorization.

12240257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 12240257 is about 3498.6078659947. The cubic root of 12240257 is about 230.4606834534.

Adding to 12240257 its reverse (75204221), we get a palindrome (87444478).

The spelling of 12240257 in words is "twelve million, two hundred forty thousand, two hundred fifty-seven".