3865601 has 2 divisors, whose sum is σ = 3865602. Its totient is φ = 3865600.

The previous prime is 3865591. The next prime is 3865637. The reversal of 3865601 is 1065683.

3865601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 274576 = 1895^2 + 524^2 .

It is an emirp because it is prime and its reverse (1065683) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3865601 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3865691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932800 + 1932801.

It is an arithmetic number, because the mean of its divisors is an integer number (1932801).

Almost surely, 2^3865601 is an apocalyptic number.

It is an amenable number.

3865601 is a deficient number, since it is larger than the sum of its proper divisors (1).

3865601 is an equidigital number, since it uses as much as digits as its factorization.

3865601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3865601 is about 1966.1131707000. The cubic root of 3865601 is about 156.9419369590.

The spelling of 3865601 in words is "three million, eight hundred sixty-five thousand, six hundred one".