12225657 has 4 divisors (see below), whose sum is σ = 16300880. Its totient is φ = 8150436.

The previous prime is 12225649. The next prime is 12225659. The reversal of 12225657 is 75652221.

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 not a de Polignac number, because 12225657 - 2³ = 12225649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12225659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037607 + ... + 2037612.

It is an arithmetic number, because the mean of its divisors is an integer number (4075220).

Almost surely, 2^12225657 is an apocalyptic number.

It is an amenable number.

12225657 is a deficient number, since it is larger than the sum of its proper divisors (4075223).

12225657 is an equidigital number, since it uses as much as digits as its factorization.

12225657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075222.

The product of its digits is 8400, while the sum is 30.

The square root of 12225657 is about 3496.5206992094. The cubic root of 12225657 is about 230.3690169504.

Adding to 12225657 its reverse (75652221), we get a palindrome (87877878).

The spelling of 12225657 in words is "twelve million, two hundred twenty-five thousand, six hundred fifty-seven".