12226620 has 96 divisors (see below), whose sum is σ = 40094208. Its totient is φ = 2725632.

The previous prime is 12226609. The next prime is 12226631. The reversal of 12226620 is 2662221.

It is an interprime number because it is at equal distance from previous prime (12226609) and next prime (12226631).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17722 + ... + 18398.

It is an arithmetic number, because the mean of its divisors is an integer number (417648).

Almost surely, 2^12226620 is an apocalyptic number.

12226620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12226620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20047104).

12226620 is an abundant number, since it is smaller than the sum of its proper divisors (27867588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12226620 is a wasteful number, since it uses less digits than its factorization.

12226620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 12226620 is about 3496.6584048202. The cubic root of 12226620 is about 230.3750654199.

Adding to 12226620 its reverse (2662221), we get a palindrome (14888841).

The spelling of 12226620 in words is "twelve million, two hundred twenty-six thousand, six hundred twenty".