285601 has 4 divisors (see below), whose sum is σ = 288900. Its totient is φ = 282304.

The previous prime is 285599. The next prime is 285611. The reversal of 285601 is 106582.

It is a happy number.

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 104976 + 180625 = 324^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 285601 - 2¹ = 285599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285611) 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, 1516 + ... + 1693.

It is an arithmetic number, because the mean of its divisors is an integer number (72225).

2²⁸⁵⁶⁰¹ is an apocalyptic number.

It is an amenable number.

285601 is a deficient number, since it is larger than the sum of its proper divisors (3299).

285601 is an equidigital number, since it uses as much as digits as its factorization.

285601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 285601 is about 534.4165042362. The cubic root of 285601 is about 65.8546695073.

It can be divided in two parts, 28560 and 1, that added together give a 4-th power (28561 = 13⁴).

The spelling of 285601 in words is "two hundred eighty-five thousand, six hundred one".