12215641 has 8 divisors (see below), whose sum is σ = 12827520. Its totient is φ = 11616528.

The previous prime is 12215633. The next prime is 12215653. The reversal of 12215641 is 14651221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12215641 - 2³ = 12215633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12215611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1201 + ... + 5086.

It is an arithmetic number, because the mean of its divisors is an integer number (1603440).

Almost surely, 2^12215641 is an apocalyptic number.

It is an amenable number.

12215641 is a deficient number, since it is larger than the sum of its proper divisors (611879).

12215641 is an equidigital number, since it uses as much as digits as its factorization.

12215641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383.

The product of its digits is 480, while the sum is 22.

The square root of 12215641 is about 3495.0881247831. The cubic root of 12215641 is about 230.3060890037.

Adding to 12215641 its reverse (14651221), we get a palindrome (26866862).

The spelling of 12215641 in words is "twelve million, two hundred fifteen thousand, six hundred forty-one".