4242409952257 has 2 divisors, whose sum is σ = 4242409952258. Its totient is φ = 4242409952256.

The previous prime is 4242409952189. The next prime is 4242409952267. The reversal of 4242409952257 is 7522599042424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3925216838656 + 317193113601 = 1981216^2 + 563199^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242409952257 - 2³¹ = 4240262468609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4242409952198 and 4242409952207.

It is not a weakly prime, because it can be changed into another prime (4242409952267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121204976128 + 2121204976129.

It is an arithmetic number, because the mean of its divisors is an integer number (2121204976129).

Almost surely, 2^{4242409952257} is an apocalyptic number.

It is an amenable number.

4242409952257 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242409952257 is an equidigital number, since it uses as much as digits as its factorization.

4242409952257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14515200, while the sum is 55.

The spelling of 4242409952257 in words is "four trillion, two hundred forty-two billion, four hundred nine million, nine hundred fifty-two thousand, two hundred fifty-seven".