12222405 has 48 divisors (see below), whose sum is σ = 24176880. Its totient is φ = 5658624.

The previous prime is 12222403. The next prime is 12222433. The reversal of 12222405 is 50422221.

It can be written as a sum of positive squares in 8 ways, for example, as 567009 + 11655396 = 753^2 + 3414^2 .

It is not a de Polignac number, because 12222405 - 2¹ = 12222403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9331 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (503685).

Almost surely, 2^12222405 is an apocalyptic number.

12222405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12222405 is a deficient number, since it is larger than the sum of its proper divisors (11954475).

12222405 is a wasteful number, since it uses less digits than its factorization.

12222405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12222405 is about 3496.0556345688. The cubic root of 12222405 is about 230.3485892417.

Adding to 12222405 its reverse (50422221), we get a palindrome (62644626).

The spelling of 12222405 in words is "twelve million, two hundred twenty-two thousand, four hundred five".