1129811 has 4 divisors (see below), whose sum is σ = 1168800. Its totient is φ = 1090824.

The previous prime is 1129789. The next prime is 1129819. The reversal of 1129811 is 1189211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1189211 = 691 ⋅1721.

It is a cyclic number.

It is not a de Polignac number, because 1129811 - 2⁶ = 1129747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1129819) 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, 19451 + ... + 19508.

It is an arithmetic number, because the mean of its divisors is an integer number (292200).

2^1129811 is an apocalyptic number.

1129811 is a deficient number, since it is larger than the sum of its proper divisors (38989).

1129811 is an equidigital number, since it uses as much as digits as its factorization.

1129811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38988.

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

The square root of 1129811 is about 1062.9256794339. The cubic root of 1129811 is about 104.1522363655.

The spelling of 1129811 in words is "one million, one hundred twenty-nine thousand, eight hundred eleven".