285103 has 12 divisors (see below), whose sum is σ = 354288. Its totient is φ = 224640.

The previous prime is 285101. The next prime is 285113. The reversal of 285103 is 301582.

It is a happy number.

It is not a de Polignac number, because 285103 - 2¹ = 285101 is a prime.

It is a Duffinian 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1063 + ... + 1303.

It is an arithmetic number, because the mean of its divisors is an integer number (29524).

2²⁸⁵¹⁰³ is an apocalyptic number.

285103 is the 338-th heptagonal number.

285103 is a deficient number, since it is larger than the sum of its proper divisors (69185).

285103 is a wasteful number, since it uses less digits than its factorization.

285103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 285103 is about 533.9503722257. The cubic root of 285103 is about 65.8163704984.

Adding to 285103 its reverse (301582), we get a palindrome (586685).

It can be divided in two parts, 28 and 5103, that multiplied together give a square (142884 = 378²).

The spelling of 285103 in words is "two hundred eighty-five thousand, one hundred three".