1191949 has 4 divisors (see below), whose sum is σ = 1300320. Its totient is φ = 1083580.

The previous prime is 1191947. The next prime is 1191973. The reversal of 1191949 is 9491911.

It is a happy number.

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 1191949 - 2¹ = 1191947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191941) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 54169 + ... + 54190.

It is an arithmetic number, because the mean of its divisors is an integer number (325080).

2^1191949 is an apocalyptic number.

It is an amenable number.

1191949 is a deficient number, since it is larger than the sum of its proper divisors (108371).

1191949 is a wasteful number, since it uses less digits than its factorization.

1191949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108370.

The product of its digits is 2916, while the sum is 34.

The square root of 1191949 is about 1091.7641686738. The cubic root of 1191949 is about 106.0276716649.

The spelling of 1191949 in words is "one million, one hundred ninety-one thousand, nine hundred forty-nine".