285279 has 4 divisors (see below), whose sum is σ = 380376. Its totient is φ = 190184.

The previous prime is 285251. The next prime is 285281. The reversal of 285279 is 972582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 285279 - 2⁷ = 285151 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 8⁶ + 2¹⁴ + 5³ + 7² + 9⁴ .

It is a D-number.

285279 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285289) 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 3 ways as a sum of consecutive naturals, for example, 47544 + ... + 47549.

It is an arithmetic number, because the mean of its divisors is an integer number (95094).

2²⁸⁵²⁷⁹ is an apocalyptic number.

285279 is a deficient number, since it is larger than the sum of its proper divisors (95097).

285279 is an equidigital number, since it uses as much as digits as its factorization.

285279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95096.

The product of its digits is 10080, while the sum is 33.

The square root of 285279 is about 534.1151561227. The cubic root of 285279 is about 65.8299109831.

The spelling of 285279 in words is "two hundred eighty-five thousand, two hundred seventy-nine".