12054421 has 2 divisors, whose sum is σ = 12054422. Its totient is φ = 12054420.

The previous prime is 12054409. The next prime is 12054431. The reversal of 12054421 is 12445021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10400625 + 1653796 = 3225^2 + 1286^2 .

It is an emirp because it is prime and its reverse (12445021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12054421 - 2⁵ = 12054389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12054431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6027210 + 6027211.

It is an arithmetic number, because the mean of its divisors is an integer number (6027211).

Almost surely, 2^12054421 is an apocalyptic number.

It is an amenable number.

12054421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12054421 is an equidigital number, since it uses as much as digits as its factorization.

12054421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 12054421 is about 3471.9477242608. The cubic root of 12054421 is about 229.2884182722.

Adding to 12054421 its reverse (12445021), we get a palindrome (24499442).

The spelling of 12054421 in words is "twelve million, fifty-four thousand, four hundred twenty-one".