12066421 has 8 divisors (see below), whose sum is σ = 12642624. Its totient is φ = 11494560.

The previous prime is 12066419. The next prime is 12066427. The reversal of 12066421 is 12466021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12066421 - 2¹ = 12066419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12066392 and 12066401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12066427) 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 in 7 ways as a sum of consecutive naturals, for example, 5530 + ... + 7396.

It is an arithmetic number, because the mean of its divisors is an integer number (1580328).

Almost surely, 2^12066421 is an apocalyptic number.

It is an amenable number.

12066421 is a deficient number, since it is larger than the sum of its proper divisors (576203).

12066421 is a wasteful number, since it uses less digits than its factorization.

12066421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12066421 is about 3473.6754310096. The cubic root of 12066421 is about 229.3644774628.

The spelling of 12066421 in words is "twelve million, sixty-six thousand, four hundred twenty-one".