12123247 has 4 divisors (see below), whose sum is σ = 12541320. Its totient is φ = 11705176.

The previous prime is 12123239. The next prime is 12123253. The reversal of 12123247 is 74232121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74232121 = 211 ⋅351811.

It is a cyclic number.

It is not a de Polignac number, because 12123247 - 2³ = 12123239 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 (12123217) 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, 208993 + ... + 209050.

It is an arithmetic number, because the mean of its divisors is an integer number (3135330).

Almost surely, 2^12123247 is an apocalyptic number.

12123247 is a deficient number, since it is larger than the sum of its proper divisors (418073).

12123247 is an equidigital number, since it uses as much as digits as its factorization.

12123247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418072.

The product of its digits is 672, while the sum is 22.

The square root of 12123247 is about 3481.8453440668. The cubic root of 12123247 is about 229.7239725844.

Adding to 12123247 its reverse (74232121), we get a palindrome (86355368).

The spelling of 12123247 in words is "twelve million, one hundred twenty-three thousand, two hundred forty-seven".