4128001 has 4 divisors (see below), whose sum is σ = 4154452. Its totient is φ = 4101552.

The previous prime is 4127999. The next prime is 4128013. The reversal of 4128001 is 1008214.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3027600 + 1100401 = 1740^2 + 1049^2 .

It is a cyclic number.

It is not a de Polignac number, because 4128001 - 2¹ = 4127999 is a prime.

It is a Duffinian number.

4128001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4128031) 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, 12990 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (1038613).

Almost surely, 2^4128001 is an apocalyptic number.

It is an amenable number.

4128001 is a deficient number, since it is larger than the sum of its proper divisors (26451).

4128001 is a wasteful number, since it uses less digits than its factorization.

4128001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26450.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 4128001 is about 2031.7482619655. The cubic root of 4128001 is about 160.4155992358.

The spelling of 4128001 in words is "four million, one hundred twenty-eight thousand, one".