641841 has 4 divisors (see below), whose sum is σ = 855792. Its totient is φ = 427892.

The previous prime is 641833. The next prime is 641843. The reversal of 641841 is 148146.

641841 = T₂₅₈ + T₂₅₉ + ... + T₂₇₅.

641841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 641841 - 2³ = 641833 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (641843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106971 + ... + 106976.

It is an arithmetic number, because the mean of its divisors is an integer number (213948).

2⁶⁴¹⁸⁴¹ is an apocalyptic number.

It is an amenable number.

641841 is a deficient number, since it is larger than the sum of its proper divisors (213951).

641841 is a wasteful number, since it uses less digits than its factorization.

641841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213950.

The product of its digits is 768, while the sum is 24.

The square root of 641841 is about 801.1497987268. The cubic root of 641841 is about 86.2599400432.

Adding to 641841 its reverse (148146), we get a palindrome (789987).

The spelling of 641841 in words is "six hundred forty-one thousand, eight hundred forty-one".