641198 has 8 divisors (see below), whose sum is σ = 965208. Its totient is φ = 319464.

The previous prime is 641197. The next prime is 641203. The reversal of 641198 is 891146.

641198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×641198² = 822269750408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641197) 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, 740 + ... + 1352.

It is an arithmetic number, because the mean of its divisors is an integer number (120651).

2⁶⁴¹¹⁹⁸ is an apocalyptic number.

641198 is a deficient number, since it is larger than the sum of its proper divisors (324010).

641198 is a wasteful number, since it uses less digits than its factorization.

641198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its digits is 1728, while the sum is 29.

The square root of 641198 is about 800.7483999360. The cubic root of 641198 is about 86.2311251843.

The spelling of 641198 in words is "six hundred forty-one thousand, one hundred ninety-eight".