1121811 has 4 divisors (see below), whose sum is σ = 1495752. Its totient is φ = 747872.

The previous prime is 1121737. The next prime is 1121819. The reversal of 1121811 is 1181211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121811 - 2¹⁰ = 1120787 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1121819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186966 + ... + 186971.

It is an arithmetic number, because the mean of its divisors is an integer number (373938).

2^1121811 is an apocalyptic number.

1121811 is a deficient number, since it is larger than the sum of its proper divisors (373941).

1121811 is an equidigital number, since it uses as much as digits as its factorization.

1121811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373940.

The product of its digits is 16, while the sum is 15.

The square root of 1121811 is about 1059.1557959054. The cubic root of 1121811 is about 103.9058257450.

The spelling of 1121811 in words is "one million, one hundred twenty-one thousand, eight hundred eleven".