1092391 has 2 divisors, whose sum is σ = 1092392. Its totient is φ = 1092390.

The previous prime is 1092389. The next prime is 1092397. The reversal of 1092391 is 1932901.

It is a weak prime.

It is an emirp because it is prime and its reverse (1932901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1092391 - 2¹ = 1092389 is a prime.

Together with 1092389, 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 (1092397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546195 + 546196.

It is an arithmetic number, because the mean of its divisors is an integer number (546196).

2^1092391 is an apocalyptic number.

1092391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1092391 is an equidigital number, since it uses as much as digits as its factorization.

1092391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1092391 is about 1045.1751049465. The cubic root of 1092391 is about 102.9894418436.

It can be divided in two parts, 109 and 2391, that added together give a square (2500 = 50²).

The spelling of 1092391 in words is "one million, ninety-two thousand, three hundred ninety-one".