12257281 has 2 divisors, whose sum is σ = 12257282. Its totient is φ = 12257280.

The previous prime is 12257263. The next prime is 12257291. The reversal of 12257281 is 18275221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12138256 + 119025 = 3484^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 12257281 - 2¹⁹ = 11732993 is a prime.

It is a super-2 number, since 2×12257281² = 300481875025922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12257291) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128640 + 6128641.

It is an arithmetic number, because the mean of its divisors is an integer number (6128641).

Almost surely, 2^12257281 is an apocalyptic number.

It is an amenable number.

12257281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257281 is an equidigital number, since it uses as much as digits as its factorization.

12257281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 28.

The square root of 12257281 is about 3501.0399883463. The cubic root of 12257281 is about 230.5674771038.

The spelling of 12257281 in words is "twelve million, two hundred fifty-seven thousand, two hundred eighty-one".