12224657 has 4 divisors (see below), whose sum is σ = 12868080. Its totient is φ = 11581236.

The previous prime is 12224651. The next prime is 12224669. The reversal of 12224657 is 75642221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12224657 - 2⁶ = 12224593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12224651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321683 + ... + 321720.

It is an arithmetic number, because the mean of its divisors is an integer number (3217020).

Almost surely, 2^12224657 is an apocalyptic number.

It is an amenable number.

12224657 is a deficient number, since it is larger than the sum of its proper divisors (643423).

12224657 is an equidigital number, since it uses as much as digits as its factorization.

12224657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643422.

The product of its digits is 6720, while the sum is 29.

The square root of 12224657 is about 3496.3776969887. The cubic root of 12224657 is about 230.3627357529.

Adding to 12224657 its reverse (75642221), we get a palindrome (87866878).

The spelling of 12224657 in words is "twelve million, two hundred twenty-four thousand, six hundred fifty-seven".