1126891 has 4 divisors (see below), whose sum is σ = 1140552. Its totient is φ = 1113232.

The previous prime is 1126889. The next prime is 1126897. The reversal of 1126891 is 1986211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1986211 = 23 ⋅86357.

It is a cyclic number.

It is not a de Polignac number, because 1126891 - 2¹ = 1126889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1126897) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6706 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (285138).

2^1126891 is an apocalyptic number.

1126891 is a deficient number, since it is larger than the sum of its proper divisors (13661).

1126891 is an equidigital number, since it uses as much as digits as its factorization.

1126891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13660.

The product of its digits is 864, while the sum is 28.

The square root of 1126891 is about 1061.5512234461. The cubic root of 1126891 is about 104.0624316959.

The spelling of 1126891 in words is "one million, one hundred twenty-six thousand, eight hundred ninety-one".