12424217257 has 6 divisors (see below), whose sum is σ = 12987887402. Its totient is φ = 11884033392.

The previous prime is 12424217237. The next prime is 12424217279. The reversal of 12424217257 is 75271242421.

It can be written as a sum of positive squares in only one way, i.e., 11645863056 + 778354201 = 107916^2 + 27899^2 .

It is not a de Polignac number, because 12424217257 - 2¹⁹ = 12423692969 is a prime.

It is a super-2 number, since 2×12424217257² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12424217237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11742588 + ... + 11743645.

Almost surely, 2^12424217257 is an apocalyptic number.

It is an amenable number.

12424217257 is a deficient number, since it is larger than the sum of its proper divisors (563670145).

12424217257 is an equidigital number, since it uses as much as digits as its factorization.

12424217257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23486279 (or 23486256 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

Adding to 12424217257 its reverse (75271242421), we get a palindrome (87695459678).

The spelling of 12424217257 in words is "twelve billion, four hundred twenty-four million, two hundred seventeen thousand, two hundred fifty-seven".