2117243 has 4 divisors (see below), whose sum is σ = 2124240. Its totient is φ = 2110248.

The previous prime is 2117239. The next prime is 2117273. The reversal of 2117243 is 3427112.

2117243 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.

It is a cyclic number.

It is not a de Polignac number, because 2117243 - 2² = 2117239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2117233) 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, 3023 + ... + 3656.

It is an arithmetic number, because the mean of its divisors is an integer number (531060).

2^2117243 is an apocalyptic number.

2117243 is a deficient number, since it is larger than the sum of its proper divisors (6997).

2117243 is an equidigital number, since it uses as much as digits as its factorization.

2117243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996.

The product of its digits is 336, while the sum is 20.

The square root of 2117243 is about 1455.0749121609. The cubic root of 2117243 is about 128.4074540433.

The spelling of 2117243 in words is "two million, one hundred seventeen thousand, two hundred forty-three".