2745643 has 2 divisors, whose sum is σ = 2745644. Its totient is φ = 2745642.

The previous prime is 2745637. The next prime is 2745661. The reversal of 2745643 is 3465472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2745643 - 2⁹ = 2745131 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 7 + 4⁷ + 5⁷ + 6² + 4¹⁰ + 3¹³ .

It is not a weakly prime, because it can be changed into another prime (2740643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1372821 + 1372822.

It is an arithmetic number, because the mean of its divisors is an integer number (1372822).

2^2745643 is an apocalyptic number.

2745643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2745643 is an equidigital number, since it uses as much as digits as its factorization.

2745643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 31.

The square root of 2745643 is about 1656.9981894981. The cubic root of 2745643 is about 140.0279366018.

The spelling of 2745643 in words is "two million, seven hundred forty-five thousand, six hundred forty-three".