12626221 has 4 divisors (see below), whose sum is σ = 12894912. Its totient is φ = 12357532.

The previous prime is 12626191. The next prime is 12626227. The reversal of 12626221 is 12262621.

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 12626221 - 2⁷ = 12626093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12626192 and 12626201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12626227) 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, 134275 + ... + 134368.

It is an arithmetic number, because the mean of its divisors is an integer number (3223728).

Almost surely, 2^12626221 is an apocalyptic number.

It is an amenable number.

12626221 is a deficient number, since it is larger than the sum of its proper divisors (268691).

12626221 is an equidigital number, since it uses as much as digits as its factorization.

12626221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268690.

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

The square root of 12626221 is about 3553.3394152543. The cubic root of 12626221 is about 232.8579816942.

Adding to 12626221 its reverse (12262621), we get a palindrome (24888842).

The spelling of 12626221 in words is "twelve million, six hundred twenty-six thousand, two hundred twenty-one".