1126865 has 4 divisors (see below), whose sum is σ = 1352244. Its totient is φ = 901488.

The previous prime is 1126861. The next prime is 1126889. The reversal of 1126865 is 5686211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 583696 + 543169 = 764^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 1126865 - 2² = 1126861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1126861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112682 + ... + 112691.

It is an arithmetic number, because the mean of its divisors is an integer number (338061).

2^1126865 is an apocalyptic number.

It is an amenable number.

1126865 is a deficient number, since it is larger than the sum of its proper divisors (225379).

1126865 is an equidigital number, since it uses as much as digits as its factorization.

1126865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225378.

The product of its digits is 2880, while the sum is 29.

The square root of 1126865 is about 1061.5389771459. The cubic root of 1126865 is about 104.0616313689.

It can be divided in two parts, 1126 and 865, that added together give a palindrome (1991).

The spelling of 1126865 in words is "one million, one hundred twenty-six thousand, eight hundred sixty-five".