12154223 has 4 divisors (see below), whose sum is σ = 12167760. Its totient is φ = 12140688.

The previous prime is 12154217. The next prime is 12154231. The reversal of 12154223 is 32245121.

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 12154223 - 2⁶ = 12154159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12154195 and 12154204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12154273) 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, 5318 + ... + 7251.

It is an arithmetic number, because the mean of its divisors is an integer number (3041940).

Almost surely, 2^12154223 is an apocalyptic number.

12154223 is a deficient number, since it is larger than the sum of its proper divisors (13537).

12154223 is an equidigital number, since it uses as much as digits as its factorization.

12154223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13536.

The product of its digits is 480, while the sum is 20.

The square root of 12154223 is about 3486.2907222433. The cubic root of 12154223 is about 229.9194614043.

Adding to 12154223 its reverse (32245121), we get a palindrome (44399344).

The spelling of 12154223 in words is "twelve million, one hundred fifty-four thousand, two hundred twenty-three".