7985641 has 2 divisors, whose sum is σ = 7985642. Its totient is φ = 7985640.

The previous prime is 7985617. The next prime is 7985647. The reversal of 7985641 is 1465897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6230016 + 1755625 = 2496^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 7985641 - 2¹¹ = 7983593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7985594 and 7985603.

It is not a weakly prime, because it can be changed into another prime (7985647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992820 + 3992821.

It is an arithmetic number, because the mean of its divisors is an integer number (3992821).

Almost surely, 2^7985641 is an apocalyptic number.

It is an amenable number.

7985641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985641 is an equidigital number, since it uses as much as digits as its factorization.

7985641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 7985641 is about 2825.8876481559. The cubic root of 7985641 is about 199.8802700046.

It can be divided in two parts, 79856 and 41, that added together give a palindrome (79897).

The spelling of 7985641 in words is "seven million, nine hundred eighty-five thousand, six hundred forty-one".