2851005 has 16 divisors (see below), whose sum is σ = 4627584. Its totient is φ = 1498560.

The previous prime is 2851001. The next prime is 2851049. The reversal of 2851005 is 5001582.

2851005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2851005 - 2² = 2851001 is a prime.

2851005 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851001) 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 15 ways as a sum of consecutive naturals, for example, 274 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (289224).

2^2851005 is an apocalyptic number.

It is an amenable number.

2851005 is a deficient number, since it is larger than the sum of its proper divisors (1776579).

2851005 is a wasteful number, since it uses less digits than its factorization.

2851005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 2851005 is about 1688.4919306884. The cubic root of 2851005 is about 141.7966573109.

Adding to 2851005 its reverse (5001582), we get a palindrome (7852587).

The spelling of 2851005 in words is "two million, eight hundred fifty-one thousand, five".