12018791 has 4 divisors (see below), whose sum is σ = 12034152. Its totient is φ = 12003432.

The previous prime is 12018749. The next prime is 12018817. The reversal of 12018791 is 19781021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19781021 = 13 ⋅1521617.

It is a cyclic number.

It is not a de Polignac number, because 12018791 - 2¹⁴ = 12002407 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 (12018491) 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, 6440 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (3008538).

Almost surely, 2^12018791 is an apocalyptic number.

12018791 is a deficient number, since it is larger than the sum of its proper divisors (15361).

12018791 is an equidigital number, since it uses as much as digits as its factorization.

12018791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15360.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 12018791 is about 3466.8128014071. The cubic root of 12018791 is about 229.0622879956.

The spelling of 12018791 in words is "twelve million, eighteen thousand, seven hundred ninety-one".