823241 has 2 divisors, whose sum is σ = 823242. Its totient is φ = 823240.

The previous prime is 823237. The next prime is 823243. The reversal of 823241 is 142328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774400 + 48841 = 880^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 823241 - 2² = 823237 is a prime.

Together with 823243, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (823243) 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, 411620 + 411621.

It is an arithmetic number, because the mean of its divisors is an integer number (411621).

2⁸²³²⁴¹ is an apocalyptic number.

It is an amenable number.

823241 is a deficient number, since it is larger than the sum of its proper divisors (1).

823241 is an equidigital number, since it uses as much as digits as its factorization.

823241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 823241 is about 907.3262919149. The cubic root of 823241 is about 93.7221689239.

Adding to 823241 its reverse (142328), we get a palindrome (965569).

The spelling of 823241 in words is "eight hundred twenty-three thousand, two hundred forty-one".