641213 has 2 divisors, whose sum is σ = 641214. Its totient is φ = 641212.

The previous prime is 641203. The next prime is 641227. The reversal of 641213 is 312146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 466489 + 174724 = 683^2 + 418^2 .

It is a cyclic number.

It is not a de Polignac number, because 641213 - 2⁴ = 641197 is a prime.

It is a super-2 number, since 2×641213² = 822308222738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 641191 and 641200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320606 + 320607.

It is an arithmetic number, because the mean of its divisors is an integer number (320607).

2⁶⁴¹²¹³ is an apocalyptic number.

It is an amenable number.

641213 is a deficient number, since it is larger than the sum of its proper divisors (1).

641213 is an equidigital number, since it uses as much as digits as its factorization.

641213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 17.

The square root of 641213 is about 800.7577661191. The cubic root of 641213 is about 86.2317976011.

Adding to 641213 its reverse (312146), we get a palindrome (953359).

The spelling of 641213 in words is "six hundred forty-one thousand, two hundred thirteen".