4002423 has 4 divisors (see below), whose sum is σ = 5336568. Its totient is φ = 2668280.

The previous prime is 4002403. The next prime is 4002431. The reversal of 4002423 is 3242004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4002423 - 2¹⁰ = 4001399 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002403) 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 3 ways as a sum of consecutive naturals, for example, 667068 + ... + 667073.

It is an arithmetic number, because the mean of its divisors is an integer number (1334142).

Almost surely, 2^4002423 is an apocalyptic number.

4002423 is a deficient number, since it is larger than the sum of its proper divisors (1334145).

4002423 is a wasteful number, since it uses less digits than its factorization.

4002423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334144.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 4002423 is about 2000.6056582945. The cubic root of 4002423 is about 158.7721510000.

Adding to 4002423 its reverse (3242004), we get a palindrome (7244427).

The spelling of 4002423 in words is "four million, two thousand, four hundred twenty-three".