1125865 has 8 divisors (see below), whose sum is σ = 1455048. Its totient is φ = 831360.

The previous prime is 1125857. The next prime is 1125871. The reversal of 1125865 is 5685211.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 1125721 = 12^2 + 1061^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1125865 - 2³ = 1125857 is a prime.

It is a Duffinian number.

1125865 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8596 + ... + 8725.

It is an arithmetic number, because the mean of its divisors is an integer number (181881).

2^1125865 is an apocalyptic number.

It is an amenable number.

1125865 is a deficient number, since it is larger than the sum of its proper divisors (329183).

1125865 is a wasteful number, since it uses less digits than its factorization.

1125865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17339.

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

The square root of 1125865 is about 1061.0678583389. The cubic root of 1125865 is about 104.0308402127.

The spelling of 1125865 in words is "one million, one hundred twenty-five thousand, eight hundred sixty-five".