242558761 has 2 divisors, whose sum is σ = 242558762. Its totient is φ = 242558760.

The previous prime is 242558711. The next prime is 242558777. The reversal of 242558761 is 167855242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182790400 + 59768361 = 13520^2 + 7731^2 .

It is a cyclic number.

It is not a de Polignac number, because 242558761 - 2¹⁹ = 242034473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242558711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121279380 + 121279381.

It is an arithmetic number, because the mean of its divisors is an integer number (121279381).

Almost surely, 2^242558761 is an apocalyptic number.

It is an amenable number.

242558761 is a deficient number, since it is larger than the sum of its proper divisors (1).

242558761 is an equidigital number, since it uses as much as digits as its factorization.

242558761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 40.

The square root of 242558761 is about 15574.2980901227. The cubic root of 242558761 is about 623.6472167967.

The spelling of 242558761 in words is "two hundred forty-two million, five hundred fifty-eight thousand, seven hundred sixty-one".