12421320 has 32 divisors (see below), whose sum is σ = 37264320. Its totient is φ = 3312320.

The previous prime is 12421291. The next prime is 12421327. The reversal of 12421320 is 2312421.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12421320.

It is not an unprimeable number, because it can be changed into a prime (12421327) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 51636 + ... + 51875.

It is an arithmetic number, because the mean of its divisors is an integer number (1164510).

Almost surely, 2^12421320 is an apocalyptic number.

12421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421320 is an abundant number, since it is smaller than the sum of its proper divisors (24843000).

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

12421320 is a wasteful number, since it uses less digits than its factorization.

12421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103525 (or 103521 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12421320 is about 3524.3893088023. The cubic root of 12421320 is about 231.5914828288.

Adding to 12421320 its reverse (2312421), we get a palindrome (14733741).

The spelling of 12421320 in words is "twelve million, four hundred twenty-one thousand, three hundred twenty".