12225557 has 4 divisors (see below), whose sum is σ = 12408096. Its totient is φ = 12043020.

The previous prime is 12225553. The next prime is 12225611. The reversal of 12225557 is 75552221.

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 12225557 - 2² = 12225553 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225553) 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 3 ways as a sum of consecutive naturals, for example, 91169 + ... + 91302.

It is an arithmetic number, because the mean of its divisors is an integer number (3102024).

Almost surely, 2^12225557 is an apocalyptic number.

It is an amenable number.

12225557 is a deficient number, since it is larger than the sum of its proper divisors (182539).

12225557 is an equidigital number, since it uses as much as digits as its factorization.

12225557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182538.

The product of its digits is 7000, while the sum is 29.

The square root of 12225557 is about 3496.5063992505. The cubic root of 12225557 is about 230.3683888461.

Adding to 12225557 its reverse (75552221), we get a palindrome (87777778).

The spelling of 12225557 in words is "twelve million, two hundred twenty-five thousand, five hundred fifty-seven".