1127891 has 2 divisors, whose sum is σ = 1127892. Its totient is φ = 1127890.

The previous prime is 1127881. The next prime is 1127911. The reversal of 1127891 is 1987211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1127891 - 2¹⁸ = 865747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1127801) 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 as a sum of consecutive naturals, namely, 563945 + 563946.

It is an arithmetic number, because the mean of its divisors is an integer number (563946).

2^1127891 is an apocalyptic number.

1127891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1127891 is an equidigital number, since it uses as much as digits as its factorization.

1127891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 29.

The square root of 1127891 is about 1062.0221278297. The cubic root of 1127891 is about 104.0932041679.

The spelling of 1127891 in words is "one million, one hundred twenty-seven thousand, eight hundred ninety-one".