12668420 has 24 divisors (see below), whose sum is σ = 26971224. Its totient is φ = 4997376.

The previous prime is 12668413. The next prime is 12668449. The reversal of 12668420 is 2486621.

It can be written as a sum of positive squares in 4 ways, for example, as 669124 + 11999296 = 818^2 + 3464^2 .

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, 2879 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (1123801).

Almost surely, 2^12668420 is an apocalyptic number.

12668420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12668420 is an abundant number, since it is smaller than the sum of its proper divisors (14302804).

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

12668420 is a wasteful number, since it uses less digits than its factorization.

12668420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759 (or 8757 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 12668420 is about 3559.2723975554. The cubic root of 12668420 is about 233.1171103522.

The spelling of 12668420 in words is "twelve million, six hundred sixty-eight thousand, four hundred twenty".