2196785 has 4 divisors (see below), whose sum is σ = 2636148. Its totient is φ = 1757424.

The previous prime is 2196781. The next prime is 2196809. The reversal of 2196785 is 5876912.

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 322624 + 1874161 = 568^2 + 1369^2 .

It is a cyclic number.

It is not a de Polignac number, because 2196785 - 2² = 2196781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196781) 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, 219674 + ... + 219683.

It is an arithmetic number, because the mean of its divisors is an integer number (659037).

2^2196785 is an apocalyptic number.

It is an amenable number.

2196785 is a deficient number, since it is larger than the sum of its proper divisors (439363).

2196785 is an equidigital number, since it uses as much as digits as its factorization.

2196785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439362.

The product of its digits is 30240, while the sum is 38.

The square root of 2196785 is about 1482.1555249028. The cubic root of 2196785 is about 129.9957592305.

The spelling of 2196785 in words is "two million, one hundred ninety-six thousand, seven hundred eighty-five".