801641 has 2 divisors, whose sum is σ = 801642. Its totient is φ = 801640.

The previous prime is 801631. The next prime is 801677. The reversal of 801641 is 146108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714025 + 87616 = 845^2 + 296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801641 is a prime.

It is a Chen prime.

It is equal to p₆₄₀₈₂ and since 801641 and 64082 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (801611) 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, 400820 + 400821.

It is an arithmetic number, because the mean of its divisors is an integer number (400821).

2⁸⁰¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

801641 is a deficient number, since it is larger than the sum of its proper divisors (1).

801641 is an equidigital number, since it uses as much as digits as its factorization.

801641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 801641 is about 895.3440679426. The cubic root of 801641 is about 92.8952070488.

Adding to 801641 its reverse (146108), we get a palindrome (947749).

The spelling of 801641 in words is "eight hundred one thousand, six hundred forty-one".