71265169 has 2 divisors, whose sum is σ = 71265170. Its totient is φ = 71265168.

The previous prime is 71265167. The next prime is 71265197. The reversal of 71265169 is 96156217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56055169 + 15210000 = 7487^2 + 3900^2 .

It is an emirp because it is prime and its reverse (96156217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71265169 - 2¹ = 71265167 is a prime.

It is a super-2 number, since 2×71265169² = 10157448625197122, which contains 22 as substring.

Together with 71265167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71265163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35632584 + 35632585.

It is an arithmetic number, because the mean of its divisors is an integer number (35632585).

Almost surely, 2^71265169 is an apocalyptic number.

It is an amenable number.

71265169 is a deficient number, since it is larger than the sum of its proper divisors (1).

71265169 is an equidigital number, since it uses as much as digits as its factorization.

71265169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 71265169 is about 8441.8699942608. The cubic root of 71265169 is about 414.5966352160.

The spelling of 71265169 in words is "seventy-one million, two hundred sixty-five thousand, one hundred sixty-nine".