280106 has 4 divisors (see below), whose sum is σ = 420162. Its totient is φ = 140052.

The previous prime is 280103. The next prime is 280121. The reversal of 280106 is 601082.

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., 259081 + 21025 = 509^2 + 145^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280106.

It is not an unprimeable number, because it can be changed into a prime (280103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70025 + ... + 70028.

2²⁸⁰¹⁰⁶ is an apocalyptic number.

280106 is a deficient number, since it is larger than the sum of its proper divisors (140056).

280106 is a wasteful number, since it uses less digits than its factorization.

280106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140055.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 280106 is about 529.2504133206. The cubic root of 280106 is about 65.4295807105.

Adding to 280106 its reverse (601082), we get a palindrome (881188).

It can be divided in two parts, 2 and 80106, that added together give a palindrome (80108).

The spelling of 280106 in words is "two hundred eighty thousand, one hundred six".