285122 has 8 divisors (see below), whose sum is σ = 439356. Its totient is φ = 138672.

The previous prime is 285121. The next prime is 285139. The reversal of 285122 is 221582.

It can be written as a sum of positive squares in 2 ways, for example, as 201601 + 83521 = 449^2 + 289^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 285094 and 285103.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285122.

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 3 ways as a sum of consecutive naturals, for example, 1853 + ... + 2000.

2²⁸⁵¹²² is an apocalyptic number.

285122 is a deficient number, since it is larger than the sum of its proper divisors (154234).

285122 is a wasteful number, since it uses less digits than its factorization.

285122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892.

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

The square root of 285122 is about 533.9681638450. The cubic root of 285122 is about 65.8178325235.

The spelling of 285122 in words is "two hundred eighty-five thousand, one hundred twenty-two".