81260371 has 2 divisors, whose sum is σ = 81260372. Its totient is φ = 81260370.

The previous prime is 81260339. The next prime is 81260383. The reversal of 81260371 is 17306218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81260371 - 2⁵ = 81260339 is a prime.

It is not a weakly prime, because it can be changed into another prime (81260671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40630185 + 40630186.

It is an arithmetic number, because the mean of its divisors is an integer number (40630186).

Almost surely, 2^81260371 is an apocalyptic number.

81260371 is a deficient number, since it is larger than the sum of its proper divisors (1).

81260371 is an equidigital number, since it uses as much as digits as its factorization.

81260371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 81260371 is about 9014.4534498770. The cubic root of 81260371 is about 433.1379801239.

Adding to 81260371 its reverse (17306218), we get a palindrome (98566589).

The spelling of 81260371 in words is "eighty-one million, two hundred sixty thousand, three hundred seventy-one".