4281643 has 2 divisors, whose sum is σ = 4281644. Its totient is φ = 4281642.

The previous prime is 4281619. The next prime is 4281649. The reversal of 4281643 is 3461824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4281643 - 2²¹ = 2184491 is a prime.

It is not a weakly prime, because it can be changed into another prime (4281649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2140821 + 2140822.

It is an arithmetic number, because the mean of its divisors is an integer number (2140822).

Almost surely, 2^4281643 is an apocalyptic number.

4281643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4281643 is an equidigital number, since it uses as much as digits as its factorization.

4281643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

The square root of 4281643 is about 2069.2131354696. The cubic root of 4281643 is about 162.3816005387.

The spelling of 4281643 in words is "four million, two hundred eighty-one thousand, six hundred forty-three".