12421288 has 96 divisors (see below), whose sum is σ = 29626560. Its totient is φ = 4815360.

The previous prime is 12421267. The next prime is 12421291. The reversal of 12421288 is 88212421.

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 15.

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 23 ways as a sum of consecutive naturals, for example, 540045 + ... + 540067.

It is an arithmetic number, because the mean of its divisors is an integer number (308610).

Almost surely, 2^12421288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12421288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14813280).

12421288 is an abundant number, since it is smaller than the sum of its proper divisors (17205272).

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

12421288 is a wasteful number, since it uses less digits than its factorization.

12421288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 72 counting only the distinct ones).

The product of its digits is 2048, while the sum is 28.

The square root of 12421288 is about 3524.3847690058. The cubic root of 12421288 is about 231.5912839520.

It can be divided in two parts, 124 and 21288, that added together give a palindrome (21412).

The spelling of 12421288 in words is "twelve million, four hundred twenty-one thousand, two hundred eighty-eight".