641471 has 2 divisors, whose sum is σ = 641472. Its totient is φ = 641470.

The previous prime is 641467. The next prime is 641479. The reversal of 641471 is 174146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641471 - 2² = 641467 is a prime.

It is a super-3 number, since 3×641471³ = 791867167673190333, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320735 + 320736.

It is an arithmetic number, because the mean of its divisors is an integer number (320736).

2⁶⁴¹⁴⁷¹ is an apocalyptic number.

641471 is a deficient number, since it is larger than the sum of its proper divisors (1).

641471 is an equidigital number, since it uses as much as digits as its factorization.

641471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 641471 is about 800.9188473247. The cubic root of 641471 is about 86.2433615279.

The spelling of 641471 in words is "six hundred forty-one thousand, four hundred seventy-one".