4145128 has 16 divisors (see below), whose sum is σ = 8370180. Its totient is φ = 1913088.

The previous prime is 4145117. The next prime is 4145171. The reversal of 4145128 is 8215414.

It can be written as a sum of positive squares in 2 ways, for example, as 4088484 + 56644 = 2022^2 + 238^2 .

It is a super-2 number, since 2×4145128² = 34364172272768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19825 + ... + 20032.

Almost surely, 2^4145128 is an apocalyptic number.

It is an amenable number.

4145128 is an abundant number, since it is smaller than the sum of its proper divisors (4225052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4145128 is a wasteful number, since it uses less digits than its factorization.

4145128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39876 (or 39872 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 4145128 is about 2035.9587422146. The cubic root of 4145128 is about 160.6371469060.

The spelling of 4145128 in words is "four million, one hundred forty-five thousand, one hundred twenty-eight".