12684642 has 32 divisors (see below), whose sum is σ = 26763264. Its totient is φ = 4002000.

The previous prime is 12684583. The next prime is 12684643. The reversal of 12684642 is 24648621.

It is not an unprimeable number, because it can be changed into a prime (12684643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8017 + ... + 9467.

It is an arithmetic number, because the mean of its divisors is an integer number (836352).

Almost surely, 2^12684642 is an apocalyptic number.

12684642 is an abundant number, since it is smaller than the sum of its proper divisors (14078622).

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

12684642 is a wasteful number, since it uses less digits than its factorization.

12684642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534.

The product of its digits is 18432, while the sum is 33.

The square root of 12684642 is about 3561.5505050469. The cubic root of 12684642 is about 233.2165706053.

The spelling of 12684642 in words is "twelve million, six hundred eighty-four thousand, six hundred forty-two".