12243457 has 2 divisors, whose sum is σ = 12243458. Its totient is φ = 12243456.

The previous prime is 12243443. The next prime is 12243541. The reversal of 12243457 is 75434221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9960336 + 2283121 = 3156^2 + 1511^2 .

It is an emirp because it is prime and its reverse (75434221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12243457 - 2¹⁵ = 12210689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12243157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6121728 + 6121729.

It is an arithmetic number, because the mean of its divisors is an integer number (6121729).

Almost surely, 2^12243457 is an apocalyptic number.

It is an amenable number.

12243457 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243457 is an equidigital number, since it uses as much as digits as its factorization.

12243457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 28.

The square root of 12243457 is about 3499.0651608680. The cubic root of 12243457 is about 230.4807650015.

Adding to 12243457 its reverse (75434221), we get a palindrome (87677678).

The spelling of 12243457 in words is "twelve million, two hundred forty-three thousand, four hundred fifty-seven".