285901 has 16 divisors (see below), whose sum is σ = 368640. Its totient is φ = 215280.

The previous prime is 285871. The next prime is 285937. The reversal of 285901 is 109582.

It is a cyclic number.

It is not a de Polignac number, because 285901 - 2⁷ = 285773 is a prime.

It is an Ulam number.

It is a Duffinian number.

285901 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285101) 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, 3580 + ... + 3658.

It is an arithmetic number, because the mean of its divisors is an integer number (23040).

2²⁸⁵⁹⁰¹ is an apocalyptic number.

It is an amenable number.

285901 is a deficient number, since it is larger than the sum of its proper divisors (82739).

285901 is a wasteful number, since it uses less digits than its factorization.

285901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 285901 is about 534.6971105215. The cubic root of 285901 is about 65.8777197153.

It can be divided in two parts, 28 and 5901, that added together give a square (5929 = 77²).

The spelling of 285901 in words is "two hundred eighty-five thousand, nine hundred one".