2171243 has 2 divisors, whose sum is σ = 2171244. Its totient is φ = 2171242.

The previous prime is 2171231. The next prime is 2171249. The reversal of 2171243 is 3421712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2171243 - 2¹⁰ = 2170219 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2171249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085621 + 1085622.

It is an arithmetic number, because the mean of its divisors is an integer number (1085622).

2^2171243 is an apocalyptic number.

2171243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171243 is an equidigital number, since it uses as much as digits as its factorization.

2171243 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2171243 is about 1473.5138275564. The cubic root of 2171243 is about 129.4899740304.

Adding to 2171243 its reverse (3421712), we get a palindrome (5592955).

The spelling of 2171243 in words is "two million, one hundred seventy-one thousand, two hundred forty-three".