6642143 has 2 divisors, whose sum is σ = 6642144. Its totient is φ = 6642142.

The previous prime is 6642137. The next prime is 6642149. The reversal of 6642143 is 3412466.

It is a balanced prime because it is at equal distance from previous prime (6642137) and next prime (6642149).

It is a cyclic number.

It is not a de Polignac number, because 6642143 - 2⁴ = 6642127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6642149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321071 + 3321072.

It is an arithmetic number, because the mean of its divisors is an integer number (3321072).

Almost surely, 2^6642143 is an apocalyptic number.

6642143 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642143 is an equidigital number, since it uses as much as digits as its factorization.

6642143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 6642143 is about 2577.2355344438. The cubic root of 6642143 is about 187.9761456832.

The spelling of 6642143 in words is "six million, six hundred forty-two thousand, one hundred forty-three".