641948 has 18 divisors (see below), whose sum is σ = 1167768. Its totient is φ = 308760.

The previous prime is 641929. The next prime is 641959. The reversal of 641948 is 849146.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 3761 + ... + 3927.

It is an arithmetic number, because the mean of its divisors is an integer number (64876).

2⁶⁴¹⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

641948 is a deficient number, since it is larger than the sum of its proper divisors (525820).

641948 is a wasteful number, since it uses less digits than its factorization.

641948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 200 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 641948 is about 801.2165749658. The cubic root of 641948 is about 86.2647331829.

The spelling of 641948 in words is "six hundred forty-one thousand, nine hundred forty-eight".