2831005 has 4 divisors (see below), whose sum is σ = 3397212. Its totient is φ = 2264800.

The previous prime is 2830979. The next prime is 2831011. The reversal of 2831005 is 5001382.

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 2 ways, for example, as 1545049 + 1285956 = 1243^2 + 1134^2 .

It is not a de Polignac number, because 2831005 - 2⁵ = 2830973 is a prime.

It is a Duffinian number.

It is a congruent 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, 283096 + ... + 283105.

It is an arithmetic number, because the mean of its divisors is an integer number (849303).

2^2831005 is an apocalyptic number.

It is an amenable number.

2831005 is a deficient number, since it is larger than the sum of its proper divisors (566207).

2831005 is an equidigital number, since it uses as much as digits as its factorization.

2831005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566206.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2831005 is about 1682.5590628563. The cubic root of 2831005 is about 141.4643077786.

Adding to 2831005 its reverse (5001382), we get a palindrome (7832387).

The spelling of 2831005 in words is "two million, eight hundred thirty-one thousand, five".