1131911 has 8 divisors (see below), whose sum is σ = 1307664. Its totient is φ = 968320.

The previous prime is 1131883. The next prime is 1131913. The reversal of 1131911 is 1191311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1131911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2840 + ... + 3213.

It is an arithmetic number, because the mean of its divisors is an integer number (163458).

2^1131911 is an apocalyptic number.

1131911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131911 is a deficient number, since it is larger than the sum of its proper divisors (175753).

1131911 is a wasteful number, since it uses less digits than its factorization.

1131911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6081.

The product of its digits is 27, while the sum is 17.

The square root of 1131911 is about 1063.9130603578. The cubic root of 1131911 is about 104.2167263033.

The spelling of 1131911 in words is "one million, one hundred thirty-one thousand, nine hundred eleven".