242420317 has 2 divisors, whose sum is σ = 242420318. Its totient is φ = 242420316.

The previous prime is 242420303. The next prime is 242420333. The reversal of 242420317 is 713024242.

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., 234518596 + 7901721 = 15314^2 + 2811^2 .

It is a cyclic number.

It is not a de Polignac number, because 242420317 - 2¹⁹ = 241896029 is a prime.

It is a super-2 number, since 2×242420317² = 117535220188760978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242420291 and 242420300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242220317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121210158 + 121210159.

It is an arithmetic number, because the mean of its divisors is an integer number (121210159).

Almost surely, 2^242420317 is an apocalyptic number.

It is an amenable number.

242420317 is a deficient number, since it is larger than the sum of its proper divisors (1).

242420317 is an equidigital number, since it uses as much as digits as its factorization.

242420317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 242420317 is about 15569.8528252518. The cubic root of 242420317 is about 623.5285422581.

Adding to 242420317 its reverse (713024242), we get a palindrome (955444559).

The spelling of 242420317 in words is "two hundred forty-two million, four hundred twenty thousand, three hundred seventeen".