4005424123 has 4 divisors (see below), whose sum is σ = 4016967480. Its totient is φ = 3993880768.

The previous prime is 4005424121. The next prime is 4005424141. The reversal of 4005424123 is 3214245004.

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 4005424123 - 2¹ = 4005424121 is a prime.

It is a super-3 number, since 3×4005424123³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4005424121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5771158 + ... + 5771851.

It is an arithmetic number, because the mean of its divisors is an integer number (1004241870).

Almost surely, 2^4005424123 is an apocalyptic number.

4005424123 is a deficient number, since it is larger than the sum of its proper divisors (11543357).

4005424123 is a wasteful number, since it uses less digits than its factorization.

4005424123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11543356.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 4005424123 is about 63288.4201335442. The cubic root of 4005424123 is about 1588.1182494316.

Adding to 4005424123 its reverse (3214245004), we get a palindrome (7219669127).

The spelling of 4005424123 in words is "four billion, five million, four hundred twenty-four thousand, one hundred twenty-three".