2851105 has 4 divisors (see below), whose sum is σ = 3421332. Its totient is φ = 2280880.

The previous prime is 2851097. The next prime is 2851111. The reversal of 2851105 is 5011582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5011582 = 2 ⋅2505791.

It can be written as a sum of positive squares in 2 ways, for example, as 2238016 + 613089 = 1496^2 + 783^2 .

It is not a de Polignac number, because 2851105 - 2³ = 2851097 is a prime.

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 a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285106 + ... + 285115.

It is an arithmetic number, because the mean of its divisors is an integer number (855333).

2^2851105 is an apocalyptic number.

It is an amenable number.

2851105 is a deficient number, since it is larger than the sum of its proper divisors (570227).

2851105 is an equidigital number, since it uses as much as digits as its factorization.

2851105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570226.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 2851105 is about 1688.5215426520. The cubic root of 2851105 is about 141.7983151474.

Adding to 2851105 its reverse (5011582), we get a palindrome (7862687).

The spelling of 2851105 in words is "two million, eight hundred fifty-one thousand, one hundred five".