6641231 has 2 divisors, whose sum is σ = 6641232. Its totient is φ = 6641230.

The previous prime is 6641197. The next prime is 6641249. The reversal of 6641231 is 1321466.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6641231 is a prime.

It is a super-2 number, since 2×6641231² = 88211898390722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6641197 and 6641206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6641291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320615 + 3320616.

It is an arithmetic number, because the mean of its divisors is an integer number (3320616).

Almost surely, 2^6641231 is an apocalyptic number.

6641231 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641231 is an equidigital number, since it uses as much as digits as its factorization.

6641231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 6641231 is about 2577.0585945997. The cubic root of 6641231 is about 187.9675419293.

Adding to 6641231 its reverse (1321466), we get a palindrome (7962697).

The spelling of 6641231 in words is "six million, six hundred forty-one thousand, two hundred thirty-one".