12681620 has 24 divisors (see below), whose sum is σ = 30436224. Its totient is φ = 4347936.

The previous prime is 12681619. The next prime is 12681623. The reversal of 12681620 is 2618621.

It is a self number, because there is not a number n which added to its sum of digits gives 12681620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45152 + ... + 45431.

It is an arithmetic number, because the mean of its divisors is an integer number (1268176).

Almost surely, 2^12681620 is an apocalyptic number.

12681620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12681620 is an abundant number, since it is smaller than the sum of its proper divisors (17754604).

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

12681620 is a wasteful number, since it uses less digits than its factorization.

12681620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90599 (or 90597 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12681620 is about 3561.1262263503. The cubic root of 12681620 is about 233.1980485623.

The spelling of 12681620 in words is "twelve million, six hundred eighty-one thousand, six hundred twenty".