1128125 has 18 divisors (see below), whose sum is σ = 1488186. Its totient is φ = 855000.

The previous prime is 1128109. The next prime is 1128143. The reversal of 1128125 is 5218211.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 521284 + 606841 = 722^2 + 779^2 .

It is not a de Polignac number, because 1128125 - 2⁴ = 1128109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1128097 and 1128106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 59366 + ... + 59384.

It is an arithmetic number, because the mean of its divisors is an integer number (82677).

2^1128125 is an apocalyptic number.

It is an amenable number.

1128125 is a deficient number, since it is larger than the sum of its proper divisors (360061).

1128125 is an frugal number, since it uses more digits than its factorization.

1128125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 24 counting only the distinct ones).

The product of its digits is 160, while the sum is 20.

The square root of 1128125 is about 1062.1322893124. The cubic root of 1128125 is about 104.1004023001.

Multiplying 1128125 by its sum of digits (20), we get a square (22562500 = 4750²).

The spelling of 1128125 in words is "one million, one hundred twenty-eight thousand, one hundred twenty-five".