4245643 has 2 divisors, whose sum is σ = 4245644. Its totient is φ = 4245642.

The previous prime is 4245623. The next prime is 4245679. The reversal of 4245643 is 3465424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4245643 - 2⁵ = 4245611 is a prime.

It is not a weakly prime, because it can be changed into another prime (4245613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2122821 + 2122822.

It is an arithmetic number, because the mean of its divisors is an integer number (2122822).

Almost surely, 2^4245643 is an apocalyptic number.

4245643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4245643 is an equidigital number, since it uses as much as digits as its factorization.

4245643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 28.

The square root of 4245643 is about 2060.4958141185. The cubic root of 4245643 is about 161.9252182411.

The spelling of 4245643 in words is "four million, two hundred forty-five thousand, six hundred forty-three".