806245261 has 2 divisors, whose sum is σ = 806245262. Its totient is φ = 806245260.

The previous prime is 806245249. The next prime is 806245273. The reversal of 806245261 is 162542608.

It is a balanced prime because it is at equal distance from previous prime (806245249) and next prime (806245273).

It can be written as a sum of positive squares in only one way, i.e., 482461225 + 323784036 = 21965^2 + 17994^2 .

It is a cyclic number.

It is not a de Polignac number, because 806245261 - 2²¹ = 804148109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806245201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403122630 + 403122631.

It is an arithmetic number, because the mean of its divisors is an integer number (403122631).

Almost surely, 2^806245261 is an apocalyptic number.

It is an amenable number.

806245261 is a deficient number, since it is larger than the sum of its proper divisors (1).

806245261 is an equidigital number, since it uses as much as digits as its factorization.

806245261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 806245261 is about 28394.4582797418. The cubic root of 806245261 is about 930.7271689729.

Adding to 806245261 its reverse (162542608), we get a palindrome (968787869).

The spelling of 806245261 in words is "eight hundred six million, two hundred forty-five thousand, two hundred sixty-one".