12154243 has 4 divisors (see below), whose sum is σ = 12793960. Its totient is φ = 11514528.

The previous prime is 12154231. The next prime is 12154267. The reversal of 12154243 is 34245121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34245121 = 3449 ⋅9929.

It is a cyclic number.

It is not a de Polignac number, because 12154243 - 2¹³ = 12146051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12154273) 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 3 ways as a sum of consecutive naturals, for example, 319830 + ... + 319867.

It is an arithmetic number, because the mean of its divisors is an integer number (3198490).

Almost surely, 2^12154243 is an apocalyptic number.

12154243 is a deficient number, since it is larger than the sum of its proper divisors (639717).

12154243 is an equidigital number, since it uses as much as digits as its factorization.

12154243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639716.

The product of its digits is 960, while the sum is 22.

The square root of 12154243 is about 3486.2935906203. The cubic root of 12154243 is about 229.9195875165.

Adding to 12154243 its reverse (34245121), we get a palindrome (46399364).

The spelling of 12154243 in words is "twelve million, one hundred fifty-four thousand, two hundred forty-three".