641835 has 24 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 321792.

The previous prime is 641833. The next prime is 641843. The reversal of 641835 is 538146.

It is not a de Polignac number, because 641835 - 2¹ = 641833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 641799 and 641808.

It is not an unprimeable number, because it can be changed into a prime (641833) 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 in 23 ways as a sum of consecutive naturals, for example, 346 + ... + 1184.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁶⁴¹⁸³⁵ is an apocalyptic number.

641835 is a deficient number, since it is larger than the sum of its proper divisors (537525).

641835 is a wasteful number, since it uses less digits than its factorization.

641835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 864 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 641835 is about 801.1460541000. The cubic root of 641835 is about 86.2596712533.

The spelling of 641835 in words is "six hundred forty-one thousand, eight hundred thirty-five".