285106 has 4 divisors (see below), whose sum is σ = 427662. Its totient is φ = 142552.

The previous prime is 285101. The next prime is 285113. The reversal of 285106 is 601582.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 265225 + 19881 = 515^2 + 141^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 71275 + ... + 71278.

2²⁸⁵¹⁰⁶ is an apocalyptic number.

285106 is a deficient number, since it is larger than the sum of its proper divisors (142556).

285106 is a wasteful number, since it uses less digits than its factorization.

285106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142555.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 285106 is about 533.9531814682. The cubic root of 285106 is about 65.8166013488.

Adding to 285106 its reverse (601582), we get a palindrome (886688).

The spelling of 285106 in words is "two hundred eighty-five thousand, one hundred six".