71711261 has 2 divisors, whose sum is σ = 71711262. Its totient is φ = 71711260.

The previous prime is 71711251. The next prime is 71711281. The reversal of 71711261 is 16211717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42172036 + 29539225 = 6494^2 + 5435^2 .

It is an emirp because it is prime and its reverse (16211717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71711261 - 2²⁶ = 4602397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71711261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71711221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35855630 + 35855631.

It is an arithmetic number, because the mean of its divisors is an integer number (35855631).

Almost surely, 2^71711261 is an apocalyptic number.

It is an amenable number.

71711261 is a deficient number, since it is larger than the sum of its proper divisors (1).

71711261 is an equidigital number, since it uses as much as digits as its factorization.

71711261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 26.

The square root of 71711261 is about 8468.2501734420. The cubic root of 71711261 is about 415.4599072279.

Adding to 71711261 its reverse (16211717), we get a palindrome (87922978).

The spelling of 71711261 in words is "seventy-one million, seven hundred eleven thousand, two hundred sixty-one".