819241 has 2 divisors, whose sum is σ = 819242. Its totient is φ = 819240.

The previous prime is 819239. The next prime is 819251. The reversal of 819241 is 142918.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817216 + 2025 = 904^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 819241 - 2¹ = 819239 is a prime.

Together with 819239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (819251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409620 + 409621.

It is an arithmetic number, because the mean of its divisors is an integer number (409621).

2⁸¹⁹²⁴¹ is an apocalyptic number.

It is an amenable number.

819241 is a deficient number, since it is larger than the sum of its proper divisors (1).

819241 is an equidigital number, since it uses as much as digits as its factorization.

819241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 819241 is about 905.1193291495. The cubic root of 819241 is about 93.5701285958.

The spelling of 819241 in words is "eight hundred nineteen thousand, two hundred forty-one".