285135871 has 2 divisors, whose sum is σ = 285135872. Its totient is φ = 285135870.

The previous prime is 285135857. The next prime is 285135889. The reversal of 285135871 is 178531582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285135871 - 2²⁷ = 150918143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285135841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142567935 + 142567936.

It is an arithmetic number, because the mean of its divisors is an integer number (142567936).

Almost surely, 2^285135871 is an apocalyptic number.

285135871 is a deficient number, since it is larger than the sum of its proper divisors (1).

285135871 is an equidigital number, since it uses as much as digits as its factorization.

285135871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The square root of 285135871 is about 16885.9666883480. The cubic root of 285135871 is about 658.1889983780.

The spelling of 285135871 in words is "two hundred eighty-five million, one hundred thirty-five thousand, eight hundred seventy-one".