641001 has 8 divisors (see below), whose sum is σ = 874720. Its totient is φ = 417312.

The previous prime is 640993. The next prime is 641051. The reversal of 641001 is 100146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641001 - 2³ = 640993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2356 + ... + 2613.

It is an arithmetic number, because the mean of its divisors is an integer number (109340).

2⁶⁴¹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

641001 is a deficient number, since it is larger than the sum of its proper divisors (233719).

641001 is a wasteful number, since it uses less digits than its factorization.

641001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5015.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 641001 is about 800.6253805620. The cubic root of 641001 is about 86.2222931378. Note that the first 4 decimals are identical.

Adding to 641001 its reverse (100146), we get a palindrome (741147).

The spelling of 641001 in words is "six hundred forty-one thousand, one".