242555587 has 2 divisors, whose sum is σ = 242555588. Its totient is φ = 242555586.

The previous prime is 242555557. The next prime is 242555639. The reversal of 242555587 is 785555242.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242555587 is a prime.

It is not a weakly prime, because it can be changed into another prime (242555557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121277793 + 121277794.

It is an arithmetic number, because the mean of its divisors is an integer number (121277794).

Almost surely, 2^242555587 is an apocalyptic number.

242555587 is a deficient number, since it is larger than the sum of its proper divisors (1).

242555587 is an equidigital number, since it uses as much as digits as its factorization.

242555587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560000, while the sum is 43.

The square root of 242555587 is about 15574.1961911362. The cubic root of 242555587 is about 623.6444965419.

The spelling of 242555587 in words is "two hundred forty-two million, five hundred fifty-five thousand, five hundred eighty-seven".