12073421 has 2 divisors, whose sum is σ = 12073422. Its totient is φ = 12073420.

The previous prime is 12073409. The next prime is 12073423. The reversal of 12073421 is 12437021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9853321 + 2220100 = 3139^2 + 1490^2 .

It is an emirp because it is prime and its reverse (12437021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12073421 is a prime.

Together with 12073423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12073393 and 12073402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12073423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6036710 + 6036711.

It is an arithmetic number, because the mean of its divisors is an integer number (6036711).

Almost surely, 2^12073421 is an apocalyptic number.

It is an amenable number.

12073421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12073421 is an equidigital number, since it uses as much as digits as its factorization.

12073421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 12073421 is about 3474.6828632265. The cubic root of 12073421 is about 229.4088220388.

The spelling of 12073421 in words is "twelve million, seventy-three thousand, four hundred twenty-one".