2862861 has 4 divisors (see below), whose sum is σ = 3817152. Its totient is φ = 1908572.

The previous prime is 2862859. The next prime is 2862883. The reversal of 2862861 is 1682682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2862861 - 2¹ = 2862859 is a prime.

It is a D-number.

2862861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2862361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477141 + ... + 477146.

It is an arithmetic number, because the mean of its divisors is an integer number (954288).

2^2862861 is an apocalyptic number.

It is an amenable number.

2862861 is a deficient number, since it is larger than the sum of its proper divisors (954291).

2862861 is an equidigital number, since it uses as much as digits as its factorization.

2862861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954290.

The product of its digits is 9216, while the sum is 33.

The square root of 2862861 is about 1691.9991134749. Note that the first 3 decimals coincide. The cubic root of 2862861 is about 141.9929408644.

The spelling of 2862861 in words is "two million, eight hundred sixty-two thousand, eight hundred sixty-one".