1191849 has 4 divisors (see below), whose sum is σ = 1589136. Its totient is φ = 794564.

The previous prime is 1191847. The next prime is 1191899. The reversal of 1191849 is 9481911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1191849 - 2¹ = 1191847 is a prime.

It is a D-number.

1191849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1191847) 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, 198639 + ... + 198644.

It is an arithmetic number, because the mean of its divisors is an integer number (397284).

2^1191849 is an apocalyptic number.

It is an amenable number.

1191849 is a deficient number, since it is larger than the sum of its proper divisors (397287).

1191849 is an equidigital number, since it uses as much as digits as its factorization.

1191849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397286.

The product of its digits is 2592, while the sum is 33.

The square root of 1191849 is about 1091.7183702769. The cubic root of 1191849 is about 106.0247064755.

The spelling of 1191849 in words is "one million, one hundred ninety-one thousand, eight hundred forty-nine".