1190811 has 4 divisors (see below), whose sum is σ = 1587752. Its totient is φ = 793872.

The previous prime is 1190809. The next prime is 1190821. The reversal of 1190811 is 1180911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1180911 = 3 ⋅393637.

It is not a de Polignac number, because 1190811 - 2¹ = 1190809 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1190821) 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 in 3 ways as a sum of consecutive naturals, for example, 198466 + ... + 198471.

It is an arithmetic number, because the mean of its divisors is an integer number (396938).

2^1190811 is an apocalyptic number.

1190811 is a deficient number, since it is larger than the sum of its proper divisors (396941).

1190811 is an equidigital number, since it uses as much as digits as its factorization.

1190811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396940.

The product of its (nonzero) digits is 72, while the sum is 21.

The square root of 1190811 is about 1091.2428693925. The cubic root of 1190811 is about 105.9939180087.

The spelling of 1190811 in words is "one million, one hundred ninety thousand, eight hundred eleven".