810123241 has 2 divisors, whose sum is σ = 810123242. Its totient is φ = 810123240.

The previous prime is 810123233. The next prime is 810123247. The reversal of 810123241 is 142321018.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802305625 + 7817616 = 28325^2 + 2796^2 .

It is a cyclic number.

It is not a de Polignac number, because 810123241 - 2³ = 810123233 is a prime.

It is not a weakly prime, because it can be changed into another prime (810123247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405061620 + 405061621.

It is an arithmetic number, because the mean of its divisors is an integer number (405061621).

Almost surely, 2^810123241 is an apocalyptic number.

It is an amenable number.

810123241 is a deficient number, since it is larger than the sum of its proper divisors (1).

810123241 is an equidigital number, since it uses as much as digits as its factorization.

810123241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 810123241 is about 28462.6639828390. The cubic root of 810123241 is about 932.2170257394.

Adding to 810123241 its reverse (142321018), we get a palindrome (952444259).

The spelling of 810123241 in words is "eight hundred ten million, one hundred twenty-three thousand, two hundred forty-one".