5171681 has 2 divisors, whose sum is σ = 5171682. Its totient is φ = 5171680.

The previous prime is 5171659. The next prime is 5171693. The reversal of 5171681 is 1861715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3671056 + 1500625 = 1916^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 5171681 - 2¹⁰ = 5170657 is a prime.

It is a super-2 number, since 2×5171681² = 53492568731522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5171381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2585840 + 2585841.

It is an arithmetic number, because the mean of its divisors is an integer number (2585841).

Almost surely, 2^5171681 is an apocalyptic number.

It is an amenable number.

5171681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5171681 is an equidigital number, since it uses as much as digits as its factorization.

5171681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 5171681 is about 2274.1330216151. The cubic root of 5171681 is about 172.9327480923.

The spelling of 5171681 in words is "five million, one hundred seventy-one thousand, six hundred eighty-one".