585421 has 4 divisors (see below), whose sum is σ = 589500. Its totient is φ = 581344.

The previous prime is 585413. The next prime is 585437. The reversal of 585421 is 124585.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124585 = 5 ⋅24917.

It can be written as a sum of positive squares in 2 ways, for example, as 75625 + 509796 = 275^2 + 714^2 .

It is a cyclic number.

It is not a de Polignac number, because 585421 - 2³ = 585413 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (585461) 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, 1816 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (147375).

2⁵⁸⁵⁴²¹ is an apocalyptic number.

It is an amenable number.

585421 is a deficient number, since it is larger than the sum of its proper divisors (4079).

585421 is a wasteful number, since it uses less digits than its factorization.

585421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4078.

The product of its digits is 1600, while the sum is 25.

The square root of 585421 is about 765.1280938510. The cubic root of 585421 is about 83.6545240037.

The spelling of 585421 in words is "five hundred eighty-five thousand, four hundred twenty-one".