6641143 has 2 divisors, whose sum is σ = 6641144. Its totient is φ = 6641142.

The previous prime is 6641083. The next prime is 6641149. The reversal of 6641143 is 3411466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6641143 - 2⁹ = 6640631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6641149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320571 + 3320572.

It is an arithmetic number, because the mean of its divisors is an integer number (3320572).

Almost surely, 2^6641143 is an apocalyptic number.

6641143 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641143 is an equidigital number, since it uses as much as digits as its factorization.

6641143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 6641143 is about 2577.0415208141. The cubic root of 6641143 is about 187.9667117008.

It can be divided in two parts, 66 and 41143, that added together give a square (41209 = 203²).

The spelling of 6641143 in words is "six million, six hundred forty-one thousand, one hundred forty-three".