12687320 has 32 divisors (see below), whose sum is σ = 28652400. Its totient is φ = 5056128.

The previous prime is 12687223. The next prime is 12687331. The reversal of 12687320 is 2378621.

It is a happy number.

12687320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 16382 + ... + 17138.

Almost surely, 2^12687320 is an apocalyptic number.

12687320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12687320 is an abundant number, since it is smaller than the sum of its proper divisors (15965080).

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

12687320 is a wasteful number, since it uses less digits than its factorization.

12687320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 12687320 is about 3561.9264450575. The cubic root of 12687320 is about 233.2329817905.

The spelling of 12687320 in words is "twelve million, six hundred eighty-seven thousand, three hundred twenty".