1086391 has 2 divisors, whose sum is σ = 1086392. Its totient is φ = 1086390.

The previous prime is 1086389. The next prime is 1086413. The reversal of 1086391 is 1936801.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1086391 - 2¹ = 1086389 is a prime.

Together with 1086389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1086301) 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, 543195 + 543196.

It is an arithmetic number, because the mean of its divisors is an integer number (543196).

2^1086391 is an apocalyptic number.

1086391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1086391 is an equidigital number, since it uses as much as digits as its factorization.

1086391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1086391 is about 1042.3008203009. The cubic root of 1086391 is about 102.8005377293.

The spelling of 1086391 in words is "one million, eighty-six thousand, three hundred ninety-one".