2856841 has 4 divisors (see below), whose sum is σ = 3076612. Its totient is φ = 2637072.

The previous prime is 2856823. The next prime is 2856857. The reversal of 2856841 is 1486582.

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 1679616 + 1177225 = 1296^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 2856841 - 2⁵ = 2856809 is a prime.

It is a Duffinian number.

2856841 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2856797 and 2856806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109866 + ... + 109891.

It is an arithmetic number, because the mean of its divisors is an integer number (769153).

2^2856841 is an apocalyptic number.

It is an amenable number.

2856841 is a deficient number, since it is larger than the sum of its proper divisors (219771).

2856841 is a wasteful number, since it uses less digits than its factorization.

2856841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219770.

The product of its digits is 15360, while the sum is 34.

The square root of 2856841 is about 1690.2192165515. The cubic root of 2856841 is about 141.8933438345.

The spelling of 2856841 in words is "two million, eight hundred fifty-six thousand, eight hundred forty-one".