1125665 has 4 divisors (see below), whose sum is σ = 1350804. Its totient is φ = 900528.

The previous prime is 1125653. The next prime is 1125679. The reversal of 1125665 is 5665211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5665211 = 19 ⋅298169.

It can be written as a sum of positive squares in 2 ways, for example, as 117649 + 1008016 = 343^2 + 1004^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125665 - 2¹⁴ = 1109281 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 112562 + ... + 112571.

It is an arithmetic number, because the mean of its divisors is an integer number (337701).

2^1125665 is an apocalyptic number.

It is an amenable number.

1125665 is a deficient number, since it is larger than the sum of its proper divisors (225139).

1125665 is an equidigital number, since it uses as much as digits as its factorization.

1125665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225138.

The product of its digits is 1800, while the sum is 26.

The square root of 1125665 is about 1060.9736094739. The cubic root of 1125665 is about 104.0246797938.

The spelling of 1125665 in words is "one million, one hundred twenty-five thousand, six hundred sixty-five".