641018 has 24 divisors (see below), whose sum is σ = 1160064. Its totient is φ = 264600.

The previous prime is 640993. The next prime is 641051. The reversal of 641018 is 810146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2933 + ... + 3143.

It is an arithmetic number, because the mean of its divisors is an integer number (48336).

2⁶⁴¹⁰¹⁸ is an apocalyptic number.

641018 is a deficient number, since it is larger than the sum of its proper divisors (519046).

641018 is a wasteful number, since it uses less digits than its factorization.

641018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 641018 is about 800.6359971922. The cubic root of 641018 is about 86.2230553654.

The spelling of 641018 in words is "six hundred forty-one thousand, eighteen".