2112817 has 4 divisors (see below), whose sum is σ = 2414656. Its totient is φ = 1810980.

The previous prime is 2112793. The next prime is 2112821. The reversal of 2112817 is 7182112.

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 2112817 - 2¹¹ = 2110769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112827) 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, 150909 + ... + 150922.

It is an arithmetic number, because the mean of its divisors is an integer number (603664).

2^2112817 is an apocalyptic number.

It is an amenable number.

2112817 is a deficient number, since it is larger than the sum of its proper divisors (301839).

2112817 is an equidigital number, since it uses as much as digits as its factorization.

2112817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301838.

The product of its digits is 224, while the sum is 22.

The square root of 2112817 is about 1453.5532325993. The cubic root of 2112817 is about 128.3179149783.

Adding to 2112817 its reverse (7182112), we get a palindrome (9294929).

The spelling of 2112817 in words is "two million, one hundred twelve thousand, eight hundred seventeen".