4001023 has 8 divisors (see below), whose sum is σ = 4390848. Its totient is φ = 3622944.

The previous prime is 4001017. The next prime is 4001027. The reversal of 4001023 is 3201004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4001023 - 2⁹ = 4000511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2215 + ... + 3592.

It is an arithmetic number, because the mean of its divisors is an integer number (548856).

Almost surely, 2^4001023 is an apocalyptic number.

4001023 is a deficient number, since it is larger than the sum of its proper divisors (389825).

4001023 is a wasteful number, since it uses less digits than its factorization.

4001023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5873.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 4001023 is about 2000.2557336501. The cubic root of 4001023 is about 158.7536366373.

Adding to 4001023 its reverse (3201004), we get a palindrome (7202027).

The spelling of 4001023 in words is "four million, one thousand, twenty-three".