2841861 has 8 divisors (see below), whose sum is σ = 4133664. Its totient is φ = 1722320.

The previous prime is 2841851. The next prime is 2841869. The reversal of 2841861 is 1681482.

2841861 = 118² + 119² + ... + 216².

2841861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2841861 - 2⁷ = 2841733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2841869) 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 7 ways as a sum of consecutive naturals, for example, 43026 + ... + 43091.

It is an arithmetic number, because the mean of its divisors is an integer number (516708).

2^2841861 is an apocalyptic number.

It is an amenable number.

2841861 is a deficient number, since it is larger than the sum of its proper divisors (1291803).

2841861 is a wasteful number, since it uses less digits than its factorization.

2841861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86131.

The product of its digits is 3072, while the sum is 30.

The square root of 2841861 is about 1685.7820143779. The cubic root of 2841861 is about 141.6449006160.

It can be divided in two parts, 284 and 1861, that added together give a triangular number (2145 = T₆₅).

The spelling of 2841861 in words is "two million, eight hundred forty-one thousand, eight hundred sixty-one".