1006891 has 2 divisors, whose sum is σ = 1006892. Its totient is φ = 1006890.

The previous prime is 1006883. The next prime is 1006897. The reversal of 1006891 is 1986001.

It is a strong prime.

It is an emirp because it is prime and its reverse (1986001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1006891 - 2³ = 1006883 is a prime.

1006891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1006897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503445 + 503446.

It is an arithmetic number, because the mean of its divisors is an integer number (503446).

2^1006891 is an apocalyptic number.

1006891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006891 is an equidigital number, since it uses as much as digits as its factorization.

1006891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1006891 is about 1003.4395846288. The cubic root of 1006891 is about 100.2291743898.

The spelling of 1006891 in words is "one million, six thousand, eight hundred ninety-one".