12646420 has 12 divisors (see below), whose sum is σ = 26557524. Its totient is φ = 5058560.

The previous prime is 12646411. The next prime is 12646423. The reversal of 12646420 is 2464621.

It can be written as a sum of positive squares in 2 ways, for example, as 3196944 + 9449476 = 1788^2 + 3074^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12646423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316141 + ... + 316180.

It is an arithmetic number, because the mean of its divisors is an integer number (2213127).

Almost surely, 2^12646420 is an apocalyptic number.

12646420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12646420 is an abundant number, since it is smaller than the sum of its proper divisors (13911104).

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

12646420 is a wasteful number, since it uses less digits than its factorization.

12646420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632330 (or 632328 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 12646420 is about 3556.1805353497. The cubic root of 12646420 is about 232.9820883036.

The spelling of 12646420 in words is "twelve million, six hundred forty-six thousand, four hundred twenty".