12256687 has 4 divisors (see below), whose sum is σ = 12652096. Its totient is φ = 11861280.

The previous prime is 12256681. The next prime is 12256697. The reversal of 12256687 is 78665221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78665221 = 23 ⋅3420227.

It is a cyclic number.

It is not a de Polignac number, because 12256687 - 2³ = 12256679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12256681) 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, 197658 + ... + 197719.

It is an arithmetic number, because the mean of its divisors is an integer number (3163024).

Almost surely, 2^12256687 is an apocalyptic number.

12256687 is a deficient number, since it is larger than the sum of its proper divisors (395409).

12256687 is an equidigital number, since it uses as much as digits as its factorization.

12256687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395408.

The product of its digits is 40320, while the sum is 37.

The square root of 12256687 is about 3500.9551553826. The cubic root of 12256687 is about 230.5637525341.

The spelling of 12256687 in words is "twelve million, two hundred fifty-six thousand, six hundred eighty-seven".