1091047 has 2 divisors, whose sum is σ = 1091048. Its totient is φ = 1091046.

The previous prime is 1091033. The next prime is 1091053. The reversal of 1091047 is 7401901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1091047 - 2⁷ = 1090919 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091017) 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, 545523 + 545524.

It is an arithmetic number, because the mean of its divisors is an integer number (545524).

2^1091047 is an apocalyptic number.

1091047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091047 is an equidigital number, since it uses as much as digits as its factorization.

1091047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1091047 is about 1044.5319525989. The cubic root of 1091047 is about 102.9471875545.

Adding to 1091047 its reverse (7401901), we get a palindrome (8492948).

It can be divided in two parts, 109 and 1047, that added together give a square (1156 = 34²).

The spelling of 1091047 in words is "one million, ninety-one thousand, forty-seven".