1128425 has 6 divisors (see below), whose sum is σ = 1399278. Its totient is φ = 902720.

The previous prime is 1128397. The next prime is 1128427. The reversal of 1128425 is 5248211.

It can be written as a sum of positive squares in 3 ways, for example, as 2704 + 1125721 = 52^2 + 1061^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1128425 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128425.

It is not an unprimeable number, because it can be changed into a prime (1128427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22544 + ... + 22593.

It is an arithmetic number, because the mean of its divisors is an integer number (233213).

2^1128425 is an apocalyptic number.

It is an amenable number.

1128425 is a deficient number, since it is larger than the sum of its proper divisors (270853).

1128425 is an equidigital number, since it uses as much as digits as its factorization.

1128425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45147 (or 45142 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 1128425 is about 1062.2735052707. The cubic root of 1128425 is about 104.1096292187.

The spelling of 1128425 in words is "one million, one hundred twenty-eight thousand, four hundred twenty-five".