12420416 has 14 divisors (see below), whose sum is σ = 24646890. Its totient is φ = 6210176.

The previous prime is 12420413. The next prime is 12420451. The reversal of 12420416 is 61402421.

It can be written as a sum of positive squares in only one way, i.e., 6270016 + 6150400 = 2504^2 + 2480^2 .

It is a super-2 number, since 2×12420416² = 308533467226112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96971 + ... + 97098.

Almost surely, 2^12420416 is an apocalyptic number.

12420416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12420416 is a deficient number, since it is larger than the sum of its proper divisors (12226474).

12420416 is an equidigital number, since it uses as much as digits as its factorization.

12420416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194081 (or 194071 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 12420416 is about 3524.2610572998. The cubic root of 12420416 is about 231.5858644302.

Adding to 12420416 its reverse (61402421), we get a palindrome (73822837).

The spelling of 12420416 in words is "twelve million, four hundred twenty thousand, four hundred sixteen".