81126341 has 2 divisors, whose sum is σ = 81126342. Its totient is φ = 81126340.

The previous prime is 81126307. The next prime is 81126343. The reversal of 81126341 is 14362118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62884900 + 18241441 = 7930^2 + 4271^2 .

It is a cyclic number.

It is not a de Polignac number, because 81126341 - 2¹⁸ = 80864197 is a prime.

Together with 81126343, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81126341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81126343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40563170 + 40563171.

It is an arithmetic number, because the mean of its divisors is an integer number (40563171).

Almost surely, 2^81126341 is an apocalyptic number.

It is an amenable number.

81126341 is a deficient number, since it is larger than the sum of its proper divisors (1).

81126341 is an equidigital number, since it uses as much as digits as its factorization.

81126341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 81126341 is about 9007.0162096002. The cubic root of 81126341 is about 432.8997113358.

Adding to 81126341 its reverse (14362118), we get a palindrome (95488459).

The spelling of 81126341 in words is "eighty-one million, one hundred twenty-six thousand, three hundred forty-one".