1191042 has 12 divisors (see below), whose sum is σ = 2580630. Its totient is φ = 397008.

The previous prime is 1191031. The next prime is 1191061. The reversal of 1191042 is 2401911.

It can be written as a sum of positive squares in only one way, i.e., 1022121 + 168921 = 1011^2 + 411^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 66169 = 1191042 / (1 + 1 + 9 + 1 + 0 + 4 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33067 + ... + 33102.

2^1191042 is an apocalyptic number.

1191042 is an abundant number, since it is smaller than the sum of its proper divisors (1389588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1191042 is a wasteful number, since it uses less digits than its factorization.

1191042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66177 (or 66174 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1191042 is about 1091.3487068760. The cubic root of 1191042 is about 106.0007713246. Note that the first 3 decimals are identical.

Adding to 1191042 its reverse (2401911), we get a palindrome (3592953).

The spelling of 1191042 in words is "one million, one hundred ninety-one thousand, forty-two".