12421273 has 4 divisors (see below), whose sum is σ = 12454948. Its totient is φ = 12387600.

The previous prime is 12421267. The next prime is 12421291. The reversal of 12421273 is 37212421.

12421273 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 37212421 = 59 ⋅630719.

It can be written as a sum of positive squares in 2 ways, for example, as 7546009 + 4875264 = 2747^2 + 2208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421273 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12421223) 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, 16278 + ... + 17023.

It is an arithmetic number, because the mean of its divisors is an integer number (3113737).

Almost surely, 2^12421273 is an apocalyptic number.

It is an amenable number.

12421273 is a deficient number, since it is larger than the sum of its proper divisors (33675).

12421273 is an equidigital number, since it uses as much as digits as its factorization.

12421273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33674.

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

The square root of 12421273 is about 3524.3826409742. The cubic root of 12421273 is about 231.5911907285.

Adding to 12421273 its reverse (37212421), we get a palindrome (49633694).

It can be divided in two parts, 12421 and 273, that multiplied together give a palindrome (3390933).

The spelling of 12421273 in words is "twelve million, four hundred twenty-one thousand, two hundred seventy-three".