12453121 has 4 divisors (see below), whose sum is σ = 12535744. Its totient is φ = 12370500.

The previous prime is 12453109. The next prime is 12453131. The reversal of 12453121 is 12135421.

12453121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12135421 = 23 ⋅527627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12453121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12453131) 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, 41085 + ... + 41386.

It is an arithmetic number, because the mean of its divisors is an integer number (3133936).

Almost surely, 2^12453121 is an apocalyptic number.

It is an amenable number.

12453121 is a deficient number, since it is larger than the sum of its proper divisors (82623).

12453121 is an equidigital number, since it uses as much as digits as its factorization.

12453121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82622.

The product of its digits is 240, while the sum is 19.

The square root of 12453121 is about 3528.8979866242. The cubic root of 12453121 is about 231.7889541798.

Adding to 12453121 its reverse (12135421), we get a palindrome (24588542).

The spelling of 12453121 in words is "twelve million, four hundred fifty-three thousand, one hundred twenty-one".