12687446 has 4 divisors (see below), whose sum is σ = 19031172. Its totient is φ = 6343722.

The previous prime is 12687439. The next prime is 12687449. The reversal of 12687446 is 64478621.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12687449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3171860 + ... + 3171863.

It is an arithmetic number, because the mean of its divisors is an integer number (4757793).

Almost surely, 2^12687446 is an apocalyptic number.

12687446 is a deficient number, since it is larger than the sum of its proper divisors (6343726).

12687446 is an equidigital number, since it uses as much as digits as its factorization.

12687446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6343725.

The product of its digits is 64512, while the sum is 38.

The square root of 12687446 is about 3561.9441320717. The cubic root of 12687446 is about 233.2337538805.

The spelling of 12687446 in words is "twelve million, six hundred eighty-seven thousand, four hundred forty-six".