12243157 has 2 divisors, whose sum is σ = 12243158. Its totient is φ = 12243156.

The previous prime is 12243151. The next prime is 12243167. The reversal of 12243157 is 75134221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 1425636 = 3289^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 12243157 - 2⁷ = 12243029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12243151) 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 as a sum of consecutive naturals, namely, 6121578 + 6121579.

It is an arithmetic number, because the mean of its divisors is an integer number (6121579).

Almost surely, 2^12243157 is an apocalyptic number.

It is an amenable number.

12243157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243157 is an equidigital number, since it uses as much as digits as its factorization.

12243157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 12243157 is about 3499.0222920124. The cubic root of 12243157 is about 230.4788825050.

Adding to 12243157 its reverse (75134221), we get a palindrome (87377378).

The spelling of 12243157 in words is "twelve million, two hundred forty-three thousand, one hundred fifty-seven".