285641247 has 16 divisors (see below), whose sum is σ = 386126720. Its totient is φ = 187810272.

The previous prime is 285641227. The next prime is 285641261. The reversal of 285641247 is 742146582.

It is not a de Polignac number, because 285641247 - 2⁷ = 285641119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285641207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63288 + ... + 67650.

It is an arithmetic number, because the mean of its divisors is an integer number (24132920).

Almost surely, 2^285641247 is an apocalyptic number.

285641247 is a deficient number, since it is larger than the sum of its proper divisors (100485473).

285641247 is a wasteful number, since it uses less digits than its factorization.

285641247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4662.

The product of its digits is 107520, while the sum is 39.

The square root of 285641247 is about 16900.9244421718. The cubic root of 285641247 is about 658.5776278354.

The spelling of 285641247 in words is "two hundred eighty-five million, six hundred forty-one thousand, two hundred forty-seven".