12258191 has 4 divisors (see below), whose sum is σ = 13372584. Its totient is φ = 11143800.

The previous prime is 12258179. The next prime is 12258209. The reversal of 12258191 is 19185221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19185221 = 11 ⋅1744111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12258191 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 (12258121) 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, 557180 + ... + 557201.

It is an arithmetic number, because the mean of its divisors is an integer number (3343146).

Almost surely, 2^12258191 is an apocalyptic number.

12258191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12258191 is a deficient number, since it is larger than the sum of its proper divisors (1114393).

12258191 is a wasteful number, since it uses less digits than its factorization.

12258191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114392.

The product of its digits is 1440, while the sum is 29.

The square root of 12258191 is about 3501.1699473176. The cubic root of 12258191 is about 230.5731828611.

The spelling of 12258191 in words is "twelve million, two hundred fifty-eight thousand, one hundred ninety-one".