285123 has 8 divisors (see below), whose sum is σ = 384336. Its totient is φ = 188000.

The previous prime is 285121. The next prime is 285139. The reversal of 285123 is 321582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285123 - 2¹ = 285121 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 8 + 1 + 5² + 2¹⁸ + 3⁸ .

285123 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 285123.

It is not an unprimeable number, because it can be changed into a prime (285121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (48042).

2²⁸⁵¹²³ is an apocalyptic number.

285123 is a deficient number, since it is larger than the sum of its proper divisors (99213).

285123 is a wasteful number, since it uses less digits than its factorization.

285123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045.

The product of its digits is 480, while the sum is 21.

The square root of 285123 is about 533.9691002296. The cubic root of 285123 is about 65.8179094704.

It can be divided in two parts, 28 and 5123, that added together give a triangular number (5151 = T₁₀₁).

The spelling of 285123 in words is "two hundred eighty-five thousand, one hundred twenty-three".