3865243 has 2 divisors, whose sum is σ = 3865244. Its totient is φ = 3865242.

The previous prime is 3865231. The next prime is 3865247. The reversal of 3865243 is 3425683.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3865243 is a prime.

It is a d-powerful number, because it can be written as 3 + 8⁷ + 6⁸ + 5⁵ + 2⁷ + 4⁸ + 3⁹ .

It is not a weakly prime, because it can be changed into another prime (3865247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932621 + 1932622.

It is an arithmetic number, because the mean of its divisors is an integer number (1932622).

Almost surely, 2^3865243 is an apocalyptic number.

3865243 is a deficient number, since it is larger than the sum of its proper divisors (1).

3865243 is an equidigital number, since it uses as much as digits as its factorization.

3865243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 3865243 is about 1966.0221260199. The cubic root of 3865243 is about 156.9370919213.

The spelling of 3865243 in words is "three million, eight hundred sixty-five thousand, two hundred forty-three".