71566241 has 2 divisors, whose sum is σ = 71566242. Its totient is φ = 71566240.

The previous prime is 71566223. The next prime is 71566247. The reversal of 71566241 is 14266517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56325025 + 15241216 = 7505^2 + 3904^2 .

It is a cyclic number.

It is not a de Polignac number, because 71566241 - 2¹⁴ = 71549857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71566198 and 71566207.

It is not a weakly prime, because it can be changed into another prime (71566247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35783120 + 35783121.

It is an arithmetic number, because the mean of its divisors is an integer number (35783121).

Almost surely, 2^71566241 is an apocalyptic number.

It is an amenable number.

71566241 is a deficient number, since it is larger than the sum of its proper divisors (1).

71566241 is an equidigital number, since it uses as much as digits as its factorization.

71566241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 71566241 is about 8459.6832683027. The cubic root of 71566241 is about 415.1796599574.

The spelling of 71566241 in words is "seventy-one million, five hundred sixty-six thousand, two hundred forty-one".