1027391 has 2 divisors, whose sum is σ = 1027392. Its totient is φ = 1027390.

The previous prime is 1027357. The next prime is 1027409. The reversal of 1027391 is 1937201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1027391 is a prime.

It is a super-3 number, since 3×1027391³ = 3253333053609412413, which contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1027321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513695 + 513696.

It is an arithmetic number, because the mean of its divisors is an integer number (513696).

2^1027391 is an apocalyptic number.

1027391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027391 is an equidigital number, since it uses as much as digits as its factorization.

1027391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1027391 is about 1013.6029794747. The cubic root of 1027391 is about 100.9048216191.

The spelling of 1027391 in words is "one million, twenty-seven thousand, three hundred ninety-one".