285401 has 4 divisors (see below), whose sum is σ = 292404. Its totient is φ = 278400.

The previous prime is 285377. The next prime is 285421. The reversal of 285401 is 104582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104582 = 2 ⋅52291.

It can be written as a sum of positive squares in 2 ways, for example, as 105625 + 179776 = 325^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 285401 - 2¹⁰ = 284377 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285401.

It is not an unprimeable number, because it can be changed into a prime (285421) 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, 3440 + ... + 3521.

It is an arithmetic number, because the mean of its divisors is an integer number (73101).

2²⁸⁵⁴⁰¹ is an apocalyptic number.

It is an amenable number.

285401 is a deficient number, since it is larger than the sum of its proper divisors (7003).

285401 is an equidigital number, since it uses as much as digits as its factorization.

285401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 285401 is about 534.2293514962. The cubic root of 285401 is about 65.8392937330.

Adding to 285401 its reverse (104582), we get a palindrome (389983).

It can be divided in two parts, 285 and 401, that added together give a palindrome (686).

The spelling of 285401 in words is "two hundred eighty-five thousand, four hundred one".