13865641 has 2 divisors, whose sum is σ = 13865642. Its totient is φ = 13865640.

The previous prime is 13865629. The next prime is 13865647. The reversal of 13865641 is 14656831.

It is a happy number.

13865641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 2876416 = 3315^2 + 1696^2 .

It is a cyclic number.

It is not a de Polignac number, because 13865641 - 2⁵ = 13865609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13865597 and 13865606.

It is not a weakly prime, because it can be changed into another prime (13865647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6932820 + 6932821.

It is an arithmetic number, because the mean of its divisors is an integer number (6932821).

Almost surely, 2^13865641 is an apocalyptic number.

It is an amenable number.

13865641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13865641 is an equidigital number, since it uses as much as digits as its factorization.

13865641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 13865641 is about 3723.6596246166. The cubic root of 13865641 is about 240.2407364534.

The spelling of 13865641 in words is "thirteen million, eight hundred sixty-five thousand, six hundred forty-one".