10128565 has 16 divisors (see below), whose sum is σ = 12730608. Its totient is φ = 7727616.

The previous prime is 10128563. The next prime is 10128571. The reversal of 10128565 is 56582101.

10128565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2951524 + 7177041 = 1718^2 + 2679^2 .

It is a cyclic number.

It is not a de Polignac number, because 10128565 - 2¹ = 10128563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10128563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9289 + ... + 10321.

It is an arithmetic number, because the mean of its divisors is an integer number (795663).

Almost surely, 2^10128565 is an apocalyptic number.

It is an amenable number.

10128565 is a deficient number, since it is larger than the sum of its proper divisors (2602043).

10128565 is a wasteful number, since it uses less digits than its factorization.

10128565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 10128565 is about 3182.5406517435. The cubic root of 10128565 is about 216.3628232813.

The spelling of 10128565 in words is "ten million, one hundred twenty-eight thousand, five hundred sixty-five".