1118291 has 2 divisors, whose sum is σ = 1118292. Its totient is φ = 1118290.

The previous prime is 1118267. The next prime is 1118303. The reversal of 1118291 is 1928111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1118291 - 2¹⁰ = 1117267 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1118261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559145 + 559146.

It is an arithmetic number, because the mean of its divisors is an integer number (559146).

2^1118291 is an apocalyptic number.

1118291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118291 is an equidigital number, since it uses as much as digits as its factorization.

1118291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 23.

The square root of 1118291 is about 1057.4927895735. The cubic root of 1118291 is about 103.7970338833.

The spelling of 1118291 in words is "one million, one hundred eighteen thousand, two hundred ninety-one".