12215005 has 16 divisors (see below), whose sum is σ = 16833600. Its totient is φ = 8415360.

The previous prime is 12214999. The next prime is 12215033. The reversal of 12215005 is 50051221.

It is not a de Polignac number, because 12215005 - 2³ = 12214997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12215005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4800 + ... + 6889.

It is an arithmetic number, because the mean of its divisors is an integer number (1052100).

Almost surely, 2^12215005 is an apocalyptic number.

It is an amenable number.

12215005 is a deficient number, since it is larger than the sum of its proper divisors (4618595).

12215005 is a wasteful number, since it uses less digits than its factorization.

12215005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11724.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 12215005 is about 3494.9971387685. The cubic root of 12215005 is about 230.3020920184.

Adding to 12215005 its reverse (50051221), we get a palindrome (62266226).

It can be divided in two parts, 1221 and 5005, that added together give a palindrome (6226).

The spelling of 12215005 in words is "twelve million, two hundred fifteen thousand, five".