7205641 has 2 divisors, whose sum is σ = 7205642. Its totient is φ = 7205640.

The previous prime is 7205629. The next prime is 7205657. The reversal of 7205641 is 1465027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 3225616 = 1995^2 + 1796^2 .

It is an emirp because it is prime and its reverse (1465027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7205641 - 2¹¹ = 7203593 is a prime.

It is not a weakly prime, because it can be changed into another prime (7205041) 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, 3602820 + 3602821.

It is an arithmetic number, because the mean of its divisors is an integer number (3602821).

Almost surely, 2^7205641 is an apocalyptic number.

It is an amenable number.

7205641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7205641 is an equidigital number, since it uses as much as digits as its factorization.

7205641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 7205641 is about 2684.3325054844. The cubic root of 7205641 is about 193.1482926979.

The spelling of 7205641 in words is "seven million, two hundred five thousand, six hundred forty-one".