4002043 has 2 divisors, whose sum is σ = 4002044. Its totient is φ = 4002042.

The previous prime is 4002041. The next prime is 4002049. The reversal of 4002043 is 3402004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4002043 - 2¹ = 4002041 is a prime.

Together with 4002041, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4002041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001021 + 2001022.

It is an arithmetic number, because the mean of its divisors is an integer number (2001022).

Almost surely, 2^4002043 is an apocalyptic number.

4002043 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002043 is an equidigital number, since it uses as much as digits as its factorization.

4002043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 4002043 is about 2000.5106848003. The cubic root of 4002043 is about 158.7671260999.

Adding to 4002043 its reverse (3402004), we get a palindrome (7404047).

The spelling of 4002043 in words is "four million, two thousand, forty-three".