812141761 has 2 divisors, whose sum is σ = 812141762. Its totient is φ = 812141760.

The previous prime is 812141699. The next prime is 812141767. The reversal of 812141761 is 167141218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799758400 + 12383361 = 28280^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 812141761 - 2⁹ = 812141249 is a prime.

It is a super-2 number, since 2×812141761² = 1319148479920362242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (812141767) 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, 406070880 + 406070881.

It is an arithmetic number, because the mean of its divisors is an integer number (406070881).

Almost surely, 2^812141761 is an apocalyptic number.

It is an amenable number.

812141761 is a deficient number, since it is larger than the sum of its proper divisors (1).

812141761 is an equidigital number, since it uses as much as digits as its factorization.

812141761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The square root of 812141761 is about 28498.1010069092. The cubic root of 812141761 is about 932.9906273961.

Adding to 812141761 its reverse (167141218), we get a palindrome (979282979).

The spelling of 812141761 in words is "eight hundred twelve million, one hundred forty-one thousand, seven hundred sixty-one".