1004112191 has 4 divisors (see below), whose sum is σ = 1063177632. Its totient is φ = 945046752.

The previous prime is 1004112163. The next prime is 1004112203. The reversal of 1004112191 is 1912114001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1004112191 is a prime.

It is a super-2 number, since 2×1004112191² = 2016482584229640962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29532695 + ... + 29532728.

It is an arithmetic number, because the mean of its divisors is an integer number (265794408).

Almost surely, 2^1004112191 is an apocalyptic number.

1004112191 is a deficient number, since it is larger than the sum of its proper divisors (59065441).

1004112191 is an equidigital number, since it uses as much as digits as its factorization.

1004112191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59065440.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1004112191 is about 31687.7293443377. The cubic root of 1004112191 is about 1001.3688557124.

Adding to 1004112191 its reverse (1912114001), we get a palindrome (2916226192).

The spelling of 1004112191 in words is "one billion, four million, one hundred twelve thousand, one hundred ninety-one".