641650 has 24 divisors (see below), whose sum is σ = 1226484. Its totient is φ = 249600.

The previous prime is 641639. The next prime is 641681. The reversal of 641650 is 56146.

641650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 49 + 641601 = 7^2 + 801^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1894 + ... + 2206.

2⁶⁴¹⁶⁵⁰ is an apocalyptic number.

641650 is a deficient number, since it is larger than the sum of its proper divisors (584834).

641650 is a wasteful number, since it uses less digits than its factorization.

641650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 641650 is about 801.0305861826. The cubic root of 641650 is about 86.2513827406.

Adding to 641650 its reverse (56146), we get a palindrome (697796).

The spelling of 641650 in words is "six hundred forty-one thousand, six hundred fifty".