641846 has 4 divisors (see below), whose sum is σ = 962772. Its totient is φ = 320922.

The previous prime is 641843. The next prime is 641863. The reversal of 641846 is 648146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 648146 = 2 ⋅324073.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 641846.

It is not an unprimeable number, because it can be changed into a prime (641843) by changing a digit.

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 as a sum of consecutive naturals, namely, 160460 + ... + 160463.

It is an arithmetic number, because the mean of its divisors is an integer number (240693).

2⁶⁴¹⁸⁴⁶ is an apocalyptic number.

641846 is a deficient number, since it is larger than the sum of its proper divisors (320926).

641846 is a wasteful number, since it uses less digits than its factorization.

641846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320925.

The product of its digits is 4608, while the sum is 29.

The square root of 641846 is about 801.1529192358. The cubic root of 641846 is about 86.2601640336.

The spelling of 641846 in words is "six hundred forty-one thousand, eight hundred forty-six".