4001423 has 4 divisors (see below), whose sum is σ = 4006968. Its totient is φ = 3995880.

The previous prime is 4001411. The next prime is 4001453. The reversal of 4001423 is 3241004.

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 4001423 - 2⁴ = 4001407 is a prime.

It is a super-2 number, since 2×4001423² = 32022772049858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4001398 and 4001407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001453) 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, 1493 + ... + 3198.

It is an arithmetic number, because the mean of its divisors is an integer number (1001742).

Almost surely, 2^4001423 is an apocalyptic number.

4001423 is a deficient number, since it is larger than the sum of its proper divisors (5545).

4001423 is an equidigital number, since it uses as much as digits as its factorization.

4001423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5544.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4001423 is about 2000.3557183661. The cubic root of 4001423 is about 158.7589268959.

Adding to 4001423 its reverse (3241004), we get a palindrome (7242427).

The spelling of 4001423 in words is "four million, one thousand, four hundred twenty-three".