4042393 has 2 divisors, whose sum is σ = 4042394. Its totient is φ = 4042392.

The previous prime is 4042391. The next prime is 4042417. The reversal of 4042393 is 3932404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2396304 + 1646089 = 1548^2 + 1283^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042393 - 2¹ = 4042391 is a prime.

Together with 4042391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4042391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021196 + 2021197.

It is an arithmetic number, because the mean of its divisors is an integer number (2021197).

Almost surely, 2^4042393 is an apocalyptic number.

It is an amenable number.

4042393 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042393 is an equidigital number, since it uses as much as digits as its factorization.

4042393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 4042393 is about 2010.5703170991. The cubic root of 4042393 is about 159.2989247587.

Adding to 4042393 its reverse (3932404), we get a palindrome (7974797).

The spelling of 4042393 in words is "four million, forty-two thousand, three hundred ninety-three".