641603 has 6 divisors (see below), whose sum is σ = 658764. Its totient is φ = 624876.

The previous prime is 641581. The next prime is 641623. The reversal of 641603 is 306146.

It is not a de Polignac number, because 641603 - 2¹⁰ = 640579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1676 + ... + 2022.

It is an arithmetic number, because the mean of its divisors is an integer number (109794).

2⁶⁴¹⁶⁰³ is an apocalyptic number.

641603 is a deficient number, since it is larger than the sum of its proper divisors (17161).

641603 is an equidigital number, since it uses as much as digits as its factorization.

641603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 641603 is about 801.0012484385. The cubic root of 641603 is about 86.2492767565.

Adding to 641603 its reverse (306146), we get a palindrome (947749).

The spelling of 641603 in words is "six hundred forty-one thousand, six hundred three".