4205128 has 8 divisors (see below), whose sum is σ = 7884630. Its totient is φ = 2102560.

The previous prime is 4205093. The next prime is 4205129. The reversal of 4205128 is 8215024.

It can be written as a sum of positive squares in only one way, i.e., 2125764 + 2079364 = 1458^2 + 1442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 4205099 and 4205108.

It is not an unprimeable number, because it can be changed into a prime (4205129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262813 + ... + 262828.

Almost surely, 2^4205128 is an apocalyptic number.

It is an amenable number.

4205128 is a deficient number, since it is larger than the sum of its proper divisors (3679502).

4205128 is a wasteful number, since it uses less digits than its factorization.

4205128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525647 (or 525643 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 4205128 is about 2050.6408754338. The cubic root of 4205128 is about 161.4085018813.

The spelling of 4205128 in words is "four million, two hundred five thousand, one hundred twenty-eight".