12420320 has 48 divisors (see below), whose sum is σ = 32015088. Its totient is φ = 4515840.

The previous prime is 12420313. The next prime is 12420329. The reversal of 12420320 is 2302421.

It is a junction number, because it is equal to n+sod(n) for n = 12420295 and 12420304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420329) 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, 1769 + ... + 5288.

It is an arithmetic number, because the mean of its divisors is an integer number (666981).

Almost surely, 2^12420320 is an apocalyptic number.

12420320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420320 is an abundant number, since it is smaller than the sum of its proper divisors (19594768).

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

12420320 is a wasteful number, since it uses less digits than its factorization.

12420320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7083 (or 7075 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 12420320 is about 3524.2474373971. The cubic root of 12420320 is about 231.5852677701.

Adding to 12420320 its reverse (2302421), we get a palindrome (14722741).

The spelling of 12420320 in words is "twelve million, four hundred twenty thousand, three hundred twenty".