285861841 has 4 divisors (see below), whose sum is σ = 285910884. Its totient is φ = 285812800.

The previous prime is 285861839. The next prime is 285861853. The reversal of 285861841 is 148168582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259081216 + 26780625 = 16096^2 + 5175^2 .

It is a cyclic number.

It is not a de Polignac number, because 285861841 - 2¹ = 285861839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285861811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14380 + ... + 27901.

It is an arithmetic number, because the mean of its divisors is an integer number (71477721).

Almost surely, 2^285861841 is an apocalyptic number.

It is an amenable number.

285861841 is a deficient number, since it is larger than the sum of its proper divisors (49043).

285861841 is an equidigital number, since it uses as much as digits as its factorization.

285861841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49042.

The product of its digits is 122880, while the sum is 43.

The square root of 285861841 is about 16907.4492753934. The cubic root of 285861841 is about 658.7471188695.

The spelling of 285861841 in words is "two hundred eighty-five million, eight hundred sixty-one thousand, eight hundred forty-one".