4023591 has 32 divisors (see below), whose sum is σ = 6435072. Its totient is φ = 2204160.

The previous prime is 4023563. The next prime is 4023599. The reversal of 4023591 is 1953204.

It is not a de Polignac number, because 4023591 - 2¹⁰ = 4022567 is a prime.

4023591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4023599) 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 in 31 ways as a sum of consecutive naturals, for example, 35551 + ... + 35663.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

Almost surely, 2^4023591 is an apocalyptic number.

4023591 is a deficient number, since it is larger than the sum of its proper divisors (2411481).

4023591 is a wasteful number, since it uses less digits than its factorization.

4023591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 4023591 is about 2005.8890796851. The cubic root of 4023591 is about 159.0515635143.

Adding to 4023591 its reverse (1953204), we get a palindrome (5976795).

It can be divided in two parts, 402 and 3591, that added together give a palindrome (3993).

The spelling of 4023591 in words is "four million, twenty-three thousand, five hundred ninety-one".