810805241 has 2 divisors, whose sum is σ = 810805242. Its totient is φ = 810805240.

The previous prime is 810805187. The next prime is 810805267. The reversal of 810805241 is 142508018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539214841 + 271590400 = 23221^2 + 16480^2 .

It is a cyclic number.

It is not a de Polignac number, because 810805241 - 2²⁶ = 743696377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (810805271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405402620 + 405402621.

It is an arithmetic number, because the mean of its divisors is an integer number (405402621).

Almost surely, 2^810805241 is an apocalyptic number.

It is an amenable number.

810805241 is a deficient number, since it is larger than the sum of its proper divisors (1).

810805241 is an equidigital number, since it uses as much as digits as its factorization.

810805241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 810805241 is about 28474.6420697434. The cubic root of 810805241 is about 932.4785471373.

The spelling of 810805241 in words is "eight hundred ten million, eight hundred five thousand, two hundred forty-one".