641946 has 16 divisors (see below), whose sum is σ = 1298304. Its totient is φ = 211584.

The previous prime is 641929. The next prime is 641959. The reversal of 641946 is 649146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (81144).

2⁶⁴¹⁹⁴⁶ is an apocalyptic number.

641946 is an abundant number, since it is smaller than the sum of its proper divisors (656358).

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

641946 is a wasteful number, since it uses less digits than its factorization.

641946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205.

The product of its digits is 5184, while the sum is 30.

The square root of 641946 is about 801.2153268629. The cubic root of 641946 is about 86.2646435964.

The spelling of 641946 in words is "six hundred forty-one thousand, nine hundred forty-six".