12042191 has 6 divisors (see below), whose sum is σ = 14008320. Its totient is φ = 10321836.

The previous prime is 12042169. The next prime is 12042197. The reversal of 12042191 is 19124021.

It is not a de Polignac number, because 12042191 - 2⁶ = 12042127 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 (12042197) 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 5 ways as a sum of consecutive naturals, for example, 122831 + ... + 122928.

It is an arithmetic number, because the mean of its divisors is an integer number (2334720).

Almost surely, 2^12042191 is an apocalyptic number.

12042191 is a deficient number, since it is larger than the sum of its proper divisors (1966129).

12042191 is an equidigital number, since it uses as much as digits as its factorization.

12042191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245773 (or 245766 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 12042191 is about 3470.1860180688. The cubic root of 12042191 is about 229.2108493251.

The spelling of 12042191 in words is "twelve million, forty-two thousand, one hundred ninety-one".