12045191 has 4 divisors (see below), whose sum is σ = 12056712. Its totient is φ = 12033672.

The previous prime is 12045181. The next prime is 12045217. The reversal of 12045191 is 19154021.

It is a happy number.

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 12045191 - 2¹⁸ = 11783047 is a prime.

It is a super-3 number, since 3×12045191³ (a number of 22 digits) contains 333 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 (12045181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4016 + ... + 6341.

It is an arithmetic number, because the mean of its divisors is an integer number (3014178).

Almost surely, 2^12045191 is an apocalyptic number.

12045191 is a deficient number, since it is larger than the sum of its proper divisors (11521).

12045191 is a wasteful number, since it uses less digits than its factorization.

12045191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11520.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 12045191 is about 3470.6182446360. The cubic root of 12045191 is about 229.2298817269.

The spelling of 12045191 in words is "twelve million, forty-five thousand, one hundred ninety-one".