1115811 has 6 divisors (see below), whose sum is σ = 1611740. Its totient is φ = 743868.

The previous prime is 1115789. The next prime is 1115831. The reversal of 1115811 is 1185111.

It is a happy number.

It is not a de Polignac number, because 1115811 - 2⁷ = 1115683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61981 + ... + 61998.

2^1115811 is an apocalyptic number.

1115811 is a deficient number, since it is larger than the sum of its proper divisors (495929).

1115811 is a wasteful number, since it uses less digits than its factorization.

1115811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123985 (or 123982 counting only the distinct ones).

The product of its digits is 40, while the sum is 18.

The square root of 1115811 is about 1056.3195539230. The cubic root of 1115811 is about 103.7202479164.

The spelling of 1115811 in words is "one million, one hundred fifteen thousand, eight hundred eleven".