12681720 has 48 divisors (see below), whose sum is σ = 41216760. Its totient is φ = 3381696.

The previous prime is 12681709. The next prime is 12681727. The reversal of 12681720 is 2718621.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12681727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17254 + ... + 17973.

Almost surely, 2^12681720 is an apocalyptic number.

12681720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12681720 is an abundant number, since it is smaller than the sum of its proper divisors (28535040).

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

12681720 is a wasteful number, since it uses less digits than its factorization.

12681720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35244 (or 35237 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12681720 is about 3561.1402668247. The cubic root of 12681720 is about 233.1986615161.

The spelling of 12681720 in words is "twelve million, six hundred eighty-one thousand, seven hundred twenty".