4128710321 has 4 divisors (see below), whose sum is σ = 4371575652. Its totient is φ = 3885844992.

The previous prime is 4128710297. The next prime is 4128710407. The reversal of 4128710321 is 1230178214.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1230178214 = 2 ⋅615089107.

It can be written as a sum of positive squares in 2 ways, for example, as 2975157025 + 1153553296 = 54545^2 + 33964^2 .

It is a cyclic number.

It is not a de Polignac number, because 4128710321 - 2¹⁴ = 4128693937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4128710021) 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, 121432640 + ... + 121432673.

It is an arithmetic number, because the mean of its divisors is an integer number (1092893913).

Almost surely, 2^4128710321 is an apocalyptic number.

It is an amenable number.

4128710321 is a deficient number, since it is larger than the sum of its proper divisors (242865331).

4128710321 is a wasteful number, since it uses less digits than its factorization.

4128710321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242865330.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 4128710321 is about 64255.0412107875. The cubic root of 4128710321 is about 1604.2478686571.

Adding to 4128710321 its reverse (1230178214), we get a palindrome (5358888535).

The spelling of 4128710321 in words is "four billion, one hundred twenty-eight million, seven hundred ten thousand, three hundred twenty-one".