1138191 has 4 divisors (see below), whose sum is σ = 1517592. Its totient is φ = 758792.

The previous prime is 1138183. The next prime is 1138213. The reversal of 1138191 is 1918311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1138191 - 2³ = 1138183 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138141) 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, 189696 + ... + 189701.

It is an arithmetic number, because the mean of its divisors is an integer number (379398).

2^1138191 is an apocalyptic number.

1138191 is a deficient number, since it is larger than the sum of its proper divisors (379401).

1138191 is an equidigital number, since it uses as much as digits as its factorization.

1138191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379400.

The product of its digits is 216, while the sum is 24.

The square root of 1138191 is about 1066.8603469995. The cubic root of 1138191 is about 104.4091072632.

The spelling of 1138191 in words is "one million, one hundred thirty-eight thousand, one hundred ninety-one".