641128201 has 12 divisors (see below), whose sum is σ = 771521220. Its totient is φ = 530587680.

The previous prime is 641128199. The next prime is 641128207. The reversal of 641128201 is 102821146.

641128201 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 2 ways, for example, as 451350025 + 189778176 = 21245^2 + 13776^2 .

It is not a de Polignac number, because 641128201 - 2¹ = 641128199 is a prime.

It is a super-2 number, since 2×641128201² = 822090740234992802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641128207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224170 + ... + 227011.

It is an arithmetic number, because the mean of its divisors is an integer number (64293435).

Almost surely, 2^641128201 is an apocalyptic number.

It is an amenable number.

641128201 is a deficient number, since it is larger than the sum of its proper divisors (130393019).

641128201 is a wasteful number, since it uses less digits than its factorization.

641128201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451224 (or 451217 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 641128201 is about 25320.5094932942. The cubic root of 641128201 is about 862.2799611203.

Adding to 641128201 its reverse (102821146), we get a palindrome (743949347).

The spelling of 641128201 in words is "six hundred forty-one million, one hundred twenty-eight thousand, two hundred one".