641200841 has 2 divisors, whose sum is σ = 641200842. Its totient is φ = 641200840.

The previous prime is 641200757. The next prime is 641200843. The reversal of 641200841 is 148002146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515290000 + 125910841 = 22700^2 + 11221^2 .

It is a cyclic number.

It is not a de Polignac number, because 641200841 - 2²⁶ = 574091977 is a prime.

It is a super-2 number, since 2×641200841² = 822277036998214562, which contains 22 as substring.

Together with 641200843, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 641200841.

It is not a weakly prime, because it can be changed into another prime (641200843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320600420 + 320600421.

It is an arithmetic number, because the mean of its divisors is an integer number (320600421).

Almost surely, 2^641200841 is an apocalyptic number.

It is an amenable number.

641200841 is a deficient number, since it is larger than the sum of its proper divisors (1).

641200841 is an equidigital number, since it uses as much as digits as its factorization.

641200841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 641200841 is about 25321.9438629818. The cubic root of 641200841 is about 862.3125254087.

Adding to 641200841 its reverse (148002146), we get a palindrome (789202987).

The spelling of 641200841 in words is "six hundred forty-one million, two hundred thousand, eight hundred forty-one".