12420816 has 40 divisors (see below), whose sum is σ = 33197280. Its totient is φ = 3997056.

The previous prime is 12420791. The next prime is 12420823. The reversal of 12420816 is 61802421.

12420816 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3070 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (829932).

Almost surely, 2^12420816 is an apocalyptic number.

12420816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12420816 is an abundant number, since it is smaller than the sum of its proper divisors (20776464).

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

12420816 is a wasteful number, since it uses less digits than its factorization.

12420816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963 (or 8957 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12420816 is about 3524.3178063279. The cubic root of 12420816 is about 231.5883504809.

The spelling of 12420816 in words is "twelve million, four hundred twenty thousand, eight hundred sixteen".