12213560 has 16 divisors (see below), whose sum is σ = 27480600. Its totient is φ = 4885408.

The previous prime is 12213541. The next prime is 12213571. The reversal of 12213560 is 6531221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 152630 + ... + 152709.

Almost surely, 2^12213560 is an apocalyptic number.

12213560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12213560 is an abundant number, since it is smaller than the sum of its proper divisors (15267040).

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

12213560 is a wasteful number, since it uses less digits than its factorization.

12213560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305350 (or 305346 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12213560 is about 3494.7904085939. The cubic root of 12213560 is about 230.2930103016.

Adding to 12213560 its reverse (6531221), we get a palindrome (18744781).

The spelling of 12213560 in words is "twelve million, two hundred thirteen thousand, five hundred sixty".