12191039 has 8 divisors (see below), whose sum is σ = 13964928. Its totient is φ = 10425240.

The previous prime is 12191021. The next prime is 12191041. The reversal of 12191039 is 93019121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12191039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12190999 and 12191017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12191009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1664 + ... + 5210.

It is an arithmetic number, because the mean of its divisors is an integer number (1745616).

Almost surely, 2^12191039 is an apocalyptic number.

12191039 is a deficient number, since it is larger than the sum of its proper divisors (1773889).

12191039 is an equidigital number, since it uses as much as digits as its factorization.

12191039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 12191039 is about 3491.5668402595. The cubic root of 12191039 is about 230.1513748307.

The spelling of 12191039 in words is "twelve million, one hundred ninety-one thousand, thirty-nine".