4021743 has 16 divisors (see below), whose sum is σ = 5976576. Its totient is φ = 2384640.

The previous prime is 4021739. The next prime is 4021751. The reversal of 4021743 is 3471204.

It is not a de Polignac number, because 4021743 - 2² = 4021739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255 + ... + 2847.

It is an arithmetic number, because the mean of its divisors is an integer number (373536).

Almost surely, 2^4021743 is an apocalyptic number.

4021743 is a deficient number, since it is larger than the sum of its proper divisors (1954833).

4021743 is a wasteful number, since it uses less digits than its factorization.

4021743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 4021743 is about 2005.4283831641. The cubic root of 4021743 is about 159.0272094568.

Adding to 4021743 its reverse (3471204), we get a palindrome (7492947).

It can be divided in two parts, 402 and 1743, that added together give a triangular number (2145 = T₆₅).

The spelling of 4021743 in words is "four million, twenty-one thousand, seven hundred forty-three".