641875 has 20 divisors (see below), whose sum is σ = 874720. Its totient is φ = 468000.

The previous prime is 641873. The next prime is 641881. The reversal of 641875 is 578146.

It is not a de Polignac number, because 641875 - 2¹ = 641873 is a prime.

Its product of digits (6720) is a multiple of the sum of its prime factors (112).

It is not an unprimeable number, because it can be changed into a prime (641873) 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 19 ways as a sum of consecutive naturals, for example, 8086 + ... + 8164.

It is an arithmetic number, because the mean of its divisors is an integer number (43736).

2⁶⁴¹⁸⁷⁵ is an apocalyptic number.

641875 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

641875 is a deficient number, since it is larger than the sum of its proper divisors (232845).

641875 is an equidigital number, since it uses as much as digits as its factorization.

641875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 97 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 641875 is about 801.1710179481. The cubic root of 641875 is about 86.2614631547.

The spelling of 641875 in words is "six hundred forty-one thousand, eight hundred seventy-five".