71265197 has 2 divisors, whose sum is σ = 71265198. Its totient is φ = 71265196.

The previous prime is 71265169. The next prime is 71265203. The reversal of 71265197 is 79156217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71048041 + 217156 = 8429^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 71265197 - 2⁶ = 71265133 is a prime.

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 71265197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71265107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35632598 + 35632599.

It is an arithmetic number, because the mean of its divisors is an integer number (35632599).

Almost surely, 2^71265197 is an apocalyptic number.

It is an amenable number.

71265197 is a deficient number, since it is larger than the sum of its proper divisors (1).

71265197 is an equidigital number, since it uses as much as digits as its factorization.

71265197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 71265197 is about 8441.8716526609. The cubic root of 71265197 is about 414.5966895141.

The spelling of 71265197 in words is "seventy-one million, two hundred sixty-five thousand, one hundred ninety-seven".