4128123 has 8 divisors (see below), whose sum is σ = 5513728. Its totient is φ = 2747304.

The previous prime is 4128119. The next prime is 4128133. The reversal of 4128123 is 3218214.

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

It is not a de Polignac number, because 4128123 - 2² = 4128119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4128123.

It is not an unprimeable number, because it can be changed into a prime (4128133) 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, 2190 + ... + 3612.

It is an arithmetic number, because the mean of its divisors is an integer number (689216).

Almost surely, 2^4128123 is an apocalyptic number.

4128123 is a deficient number, since it is larger than the sum of its proper divisors (1385605).

4128123 is a wasteful number, since it uses less digits than its factorization.

4128123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393.

The product of its digits is 384, while the sum is 21.

The square root of 4128123 is about 2031.7782851483. The cubic root of 4128123 is about 160.4171795415.

Subtracting from 4128123 its reverse (3218214), we obtain a palindrome (909909).

The spelling of 4128123 in words is "four million, one hundred twenty-eight thousand, one hundred twenty-three".