285442117 has 2 divisors, whose sum is σ = 285442118. Its totient is φ = 285442116.

The previous prime is 285442039. The next prime is 285442159. The reversal of 285442117 is 711244582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184117761 + 101324356 = 13569^2 + 10066^2 .

It is a cyclic number.

It is not a de Polignac number, because 285442117 - 2¹⁵ = 285409349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285442517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142721058 + 142721059.

It is an arithmetic number, because the mean of its divisors is an integer number (142721059).

Almost surely, 2^285442117 is an apocalyptic number.

It is an amenable number.

285442117 is a deficient number, since it is larger than the sum of its proper divisors (1).

285442117 is an equidigital number, since it uses as much as digits as its factorization.

285442117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 34.

The square root of 285442117 is about 16895.0323172227. The cubic root of 285442117 is about 658.4245534798.

Adding to 285442117 its reverse (711244582), we get a palindrome (996686699).

The spelling of 285442117 in words is "two hundred eighty-five million, four hundred forty-two thousand, one hundred seventeen".