641273 has 4 divisors (see below), whose sum is σ = 643188. Its totient is φ = 639360.

The previous prime is 641261. The next prime is 641279. The reversal of 641273 is 372146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162409 + 478864 = 403^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 641273 - 2¹⁰ = 640249 is a prime.

It is a super-2 number, since 2×641273² = 822462121058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641279) 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 3 ways as a sum of consecutive naturals, for example, 308 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (160797).

2⁶⁴¹²⁷³ is an apocalyptic number.

It is an amenable number.

641273 is a deficient number, since it is larger than the sum of its proper divisors (1915).

641273 is a wasteful number, since it uses less digits than its factorization.

641273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914.

The product of its digits is 1008, while the sum is 23.

The square root of 641273 is about 800.7952297560. The cubic root of 641273 is about 86.2344871631.

The spelling of 641273 in words is "six hundred forty-one thousand, two hundred seventy-three".