12086421 has 4 divisors (see below), whose sum is σ = 16115232. Its totient is φ = 8057612.

The previous prime is 12086387. The next prime is 12086423. The reversal of 12086421 is 12468021.

12086421 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12086421 - 2¹⁰ = 12085397 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12086391 and 12086400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12086423) 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, 2014401 + ... + 2014406.

It is an arithmetic number, because the mean of its divisors is an integer number (4028808).

Almost surely, 2^12086421 is an apocalyptic number.

It is an amenable number.

12086421 is a deficient number, since it is larger than the sum of its proper divisors (4028811).

12086421 is an equidigital number, since it uses as much as digits as its factorization.

12086421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028810.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12086421 is about 3476.5530342568. The cubic root of 12086421 is about 229.4911307986.

The spelling of 12086421 in words is "twelve million, eighty-six thousand, four hundred twenty-one".