1191043 has 12 divisors (see below), whose sum is σ = 1404480. Its totient is φ = 1006992.

The previous prime is 1191031. The next prime is 1191061. The reversal of 1191043 is 3401911.

It is a happy number.

It is not a de Polignac number, because 1191043 - 2⁵ = 1191011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1191043.

It is not an unprimeable number, because it can be changed into a prime (1191013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5230 + ... + 5452.

It is an arithmetic number, because the mean of its divisors is an integer number (117040).

2^1191043 is an apocalyptic number.

1191043 is a deficient number, since it is larger than the sum of its proper divisors (213437).

1191043 is a wasteful number, since it uses less digits than its factorization.

1191043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1191043 is about 1091.3491650246. The cubic root of 1191043 is about 106.0008009907. Note that the first 3 decimals are identical.

Adding to 1191043 its reverse (3401911), we get a palindrome (4592954).

The spelling of 1191043 in words is "one million, one hundred ninety-one thousand, forty-three".