71825641 has 2 divisors, whose sum is σ = 71825642. Its totient is φ = 71825640.

The previous prime is 71825639. The next prime is 71825647. The reversal of 71825641 is 14652817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71825625 + 16 = 8475^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 71825641 - 2¹ = 71825639 is a prime.

Together with 71825639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 71825597 and 71825606.

It is not a weakly prime, because it can be changed into another prime (71825647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35912820 + 35912821.

It is an arithmetic number, because the mean of its divisors is an integer number (35912821).

Almost surely, 2^71825641 is an apocalyptic number.

It is an amenable number.

71825641 is a deficient number, since it is larger than the sum of its proper divisors (1).

71825641 is an equidigital number, since it uses as much as digits as its factorization.

71825641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 71825641 is about 8475.0009439527. Note that the first 3 decimals coincide. The cubic root of 71825641 is about 415.6806771173.

The spelling of 71825641 in words is "seventy-one million, eight hundred twenty-five thousand, six hundred forty-one".