641140 has 12 divisors (see below), whose sum is σ = 1346436. Its totient is φ = 256448.

The previous prime is 641131. The next prime is 641143. The reversal of 641140 is 41146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 501264 + 139876 = 708^2 + 374^2 .

It is a super-2 number, since 2×641140² = 822120999200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641143) 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, 16009 + ... + 16048.

It is an arithmetic number, because the mean of its divisors is an integer number (112203).

2⁶⁴¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

641140 is an abundant number, since it is smaller than the sum of its proper divisors (705296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641140 is a wasteful number, since it uses less digits than its factorization.

641140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32066 (or 32064 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 641140 is about 800.7121829971. The cubic root of 641140 is about 86.2285250743.

Adding to 641140 its reverse (41146), we get a palindrome (682286).

The spelling of 641140 in words is "six hundred forty-one thousand, one hundred forty".