3865481 has 2 divisors, whose sum is σ = 3865482. Its totient is φ = 3865480.

The previous prime is 3865469. The next prime is 3865513. The reversal of 3865481 is 1845683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3455881 + 409600 = 1859^2 + 640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3865481 is a prime.

It is a super-2 number, since 2×3865481² = 29883886722722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3867481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932740 + 1932741.

It is an arithmetic number, because the mean of its divisors is an integer number (1932741).

Almost surely, 2^3865481 is an apocalyptic number.

It is an amenable number.

3865481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3865481 is an equidigital number, since it uses as much as digits as its factorization.

3865481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 3865481 is about 1966.0826533999. The cubic root of 3865481 is about 156.9403129573.

The spelling of 3865481 in words is "three million, eight hundred sixty-five thousand, four hundred eighty-one".