12026621 has 4 divisors (see below), whose sum is σ = 12037500. Its totient is φ = 12015744.

The previous prime is 12026603. The next prime is 12026647. The reversal of 12026621 is 12662021.

It is a happy number.

12026621 is digitally balanced in base 3, 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9369721 + 2656900 = 3061^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 12026621 - 2¹⁰ = 12025597 is a prime.

It is a super-2 number, since 2×12026621² = 289279225355282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12026593 and 12026602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12023621) 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, 3566 + ... + 6063.

It is an arithmetic number, because the mean of its divisors is an integer number (3009375).

Almost surely, 2^12026621 is an apocalyptic number.

It is an amenable number.

12026621 is a deficient number, since it is larger than the sum of its proper divisors (10879).

12026621 is an equidigital number, since it uses as much as digits as its factorization.

12026621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10878.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12026621 is about 3467.9418968604. The cubic root of 12026621 is about 229.1120203513.

Adding to 12026621 its reverse (12662021), we get a palindrome (24688642).

The spelling of 12026621 in words is "twelve million, twenty-six thousand, six hundred twenty-one".