2196861 has 4 divisors (see below), whose sum is σ = 2929152. Its totient is φ = 1464572.

The previous prime is 2196853. The next prime is 2196869. The reversal of 2196861 is 1686912.

2196861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (2196853) and next prime (2196869).

It is a cyclic number.

It is not a de Polignac number, because 2196861 - 2³ = 2196853 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196869) 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 3 ways as a sum of consecutive naturals, for example, 366141 + ... + 366146.

It is an arithmetic number, because the mean of its divisors is an integer number (732288).

2^2196861 is an apocalyptic number.

It is an amenable number.

2196861 is a deficient number, since it is larger than the sum of its proper divisors (732291).

2196861 is an equidigital number, since it uses as much as digits as its factorization.

2196861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732290.

The product of its digits is 5184, while the sum is 33.

The square root of 2196861 is about 1482.1811630162. The cubic root of 2196861 is about 129.9972583248.

The spelling of 2196861 in words is "two million, one hundred ninety-six thousand, eight hundred sixty-one".