2001423 has 4 divisors (see below), whose sum is σ = 2668568. Its totient is φ = 1334280.

The previous prime is 2001421. The next prime is 2001449. The reversal of 2001423 is 3241002.

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

It is not a de Polignac number, because 2001423 - 2¹ = 2001421 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001399 and 2001408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333568 + ... + 333573.

It is an arithmetic number, because the mean of its divisors is an integer number (667142).

2^2001423 is an apocalyptic number.

2001423 is a deficient number, since it is larger than the sum of its proper divisors (667145).

2001423 is an equidigital number, since it uses as much as digits as its factorization.

2001423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667144.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2001423 is about 1414.7165793897. The cubic root of 2001423 is about 126.0219790330.

Adding to 2001423 its reverse (3241002), we get a palindrome (5242425).

The spelling of 2001423 in words is "two million, one thousand, four hundred twenty-three".