1117811 has 2 divisors, whose sum is σ = 1117812. Its totient is φ = 1117810.

The previous prime is 1117799. The next prime is 1117813. The reversal of 1117811 is 1187111.

It is a strong prime.

It is an emirp because it is prime and its reverse (1187111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1117811 - 2¹⁸ = 855667 is a prime.

Together with 1117813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1117813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558905 + 558906.

It is an arithmetic number, because the mean of its divisors is an integer number (558906).

2^1117811 is an apocalyptic number.

1117811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117811 is an equidigital number, since it uses as much as digits as its factorization.

1117811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56, while the sum is 20.

The square root of 1117811 is about 1057.2658133128. The cubic root of 1117811 is about 103.7821809496.

The spelling of 1117811 in words is "one million, one hundred seventeen thousand, eight hundred eleven".