4243244201257 has 2 divisors, whose sum is σ = 4243244201258. Its totient is φ = 4243244201256.

The previous prime is 4243244201239. The next prime is 4243244201321. The reversal of 4243244201257 is 7521024423424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3082591344361 + 1160652856896 = 1755731^2 + 1077336^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243244201257 - 2⁷ = 4243244201129 is a prime.

It is not a weakly prime, because it can be changed into another prime (4243244201227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121622100628 + 2121622100629.

It is an arithmetic number, because the mean of its divisors is an integer number (2121622100629).

Almost surely, 2^{4243244201257} is an apocalyptic number.

It is an amenable number.

4243244201257 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243244201257 is an equidigital number, since it uses as much as digits as its factorization.

4243244201257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 40.

The spelling of 4243244201257 in words is "four trillion, two hundred forty-three billion, two hundred forty-four million, two hundred one thousand, two hundred fifty-seven".