285361 has 8 divisors (see below), whose sum is σ = 313920. Its totient is φ = 258192.

The previous prime is 285343. The next prime is 285377. The reversal of 285361 is 163582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285361 - 2¹³ = 277169 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 8 + 3⁵ + 5⁵ + 6⁷ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111 + ... + 763.

It is an arithmetic number, because the mean of its divisors is an integer number (39240).

2²⁸⁵³⁶¹ is an apocalyptic number.

It is an amenable number.

285361 is a deficient number, since it is larger than the sum of its proper divisors (28559).

285361 is a wasteful number, since it uses less digits than its factorization.

285361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695.

The product of its digits is 1440, while the sum is 25.

The square root of 285361 is about 534.1919130799. The cubic root of 285361 is about 65.8362177162.

It can be divided in two parts, 285 and 361, that added together give a palindrome (646).

The spelling of 285361 in words is "two hundred eighty-five thousand, three hundred sixty-one".