2116385 has 4 divisors (see below), whose sum is σ = 2539668. Its totient is φ = 1693104.

The previous prime is 2116357. The next prime is 2116393. The reversal of 2116385 is 5836112.

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 1098304 + 1018081 = 1048^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116385 - 2⁸ = 2116129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211634 + ... + 211643.

It is an arithmetic number, because the mean of its divisors is an integer number (634917).

2^2116385 is an apocalyptic number.

It is an amenable number.

2116385 is a deficient number, since it is larger than the sum of its proper divisors (423283).

2116385 is an equidigital number, since it uses as much as digits as its factorization.

2116385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423282.

The product of its digits is 1440, while the sum is 26.

The square root of 2116385 is about 1454.7800521041. The cubic root of 2116385 is about 128.3901062501.

The spelling of 2116385 in words is "two million, one hundred sixteen thousand, three hundred eighty-five".